diff --git a/addons/im_livechat/static/src/embed/core/disabled_features.js b/addons/im_livechat/static/src/embed/core/disabled_features.js
index ec863b4d0c4..24b2a0829c5 100644
--- a/addons/im_livechat/static/src/embed/core/disabled_features.js
+++ b/addons/im_livechat/static/src/embed/core/disabled_features.js
@@ -25,6 +25,9 @@ patch(Thread.prototype, {
     get hasMemberList() {
         return false;
     },
+    get hasAttachmentPanel() {
+        return this.type !== "livechat" && super.hasAttachmentPanel;
+    },
 });
 
 patch(ThreadService.prototype, {
diff --git a/addons/mail/controllers/discuss/channel.py b/addons/mail/controllers/discuss/channel.py
index 17397c4a495..cc22a81f7cd 100644
--- a/addons/mail/controllers/discuss/channel.py
+++ b/addons/mail/controllers/discuss/channel.py
@@ -81,3 +81,21 @@ class ChannelController(http.Controller):
     def discuss_channel_notify_typing(self, channel_id, is_typing):
         channel_member_sudo = request.env["discuss.channel.member"]._get_as_sudo_from_context_or_raise(channel_id=int(channel_id))
         channel_member_sudo._notify_typing(is_typing)
+
+    @http.route("/discuss/channel/attachments", methods=["POST"], type="json", auth="public")
+    @add_guest_to_context
+    def load_attachments(self, channel_id, limit=30, before=None):
+        """Load attachments of a channel. If before is set, load attachments
+        older than the given id.
+        :param channel_id: id of the channel
+        :param limit: maximum number of attachments to return
+        :param before: id of the attachment from which to load older attachments
+        """
+        channel_member_sudo = request.env["discuss.channel.member"]._get_as_sudo_from_context_or_raise(channel_id=channel_id)
+        domain = [
+            ["res_id", "=", channel_id],
+            ["res_model", "=", "discuss.channel"],
+        ]
+        if before:
+            domain.append(["id", "<", before])
+        return channel_member_sudo.env["ir.attachment"].search(domain, limit=limit, order="id DESC")._attachment_format()
diff --git a/addons/mail/models/ir_attachment.py b/addons/mail/models/ir_attachment.py
index 7857eb0ed7f..2624eb8b942 100644
--- a/addons/mail/models/ir_attachment.py
+++ b/addons/mail/models/ir_attachment.py
@@ -76,6 +76,7 @@ class IrAttachment(models.Model):
         safari = request and request.httprequest.user_agent and request.httprequest.user_agent.browser == 'safari'
         return [{
             'checksum': attachment.checksum,
+            'create_date': attachment.create_date,
             'id': attachment.id,
             'filename': attachment.name,
             'name': attachment.name,
diff --git a/addons/mail/static/src/core/common/attachment_model.js b/addons/mail/static/src/core/common/attachment_model.js
index ecb0082daa0..c6e1a11bc35 100644
--- a/addons/mail/static/src/core/common/attachment_model.js
+++ b/addons/mail/static/src/core/common/attachment_model.js
@@ -3,6 +3,7 @@
 import { Record } from "@mail/core/common/record";
 import { assignDefined } from "@mail/utils/common/misc";
 
+import { deserializeDateTime } from "@web/core/l10n/dates";
 import { url } from "@web/core/utils/urls";
 
 export class Attachment extends Record {
@@ -25,6 +26,8 @@ export class Attachment extends Record {
     uploading;
     /** @type {import("@mail/core/common/message_model").Message} */
     message;
+    /** @type {string} */
+    create_date;
 
     /** @type {import("@mail/core/common/thread_model").Thread} */
     get originThread() {
@@ -54,6 +57,14 @@ export class Attachment extends Record {
         return this.mimetype && this.mimetype.startsWith("application/pdf");
     }
 
+    get monthYear() {
+        if (!this.create_date) {
+            return undefined;
+        }
+        const datetime = deserializeDateTime(this.create_date);
+        return `${datetime.monthLong}, ${datetime.year}`;
+    }
+
     get isImage() {
         const imageMimetypes = [
             "image/bmp",
diff --git a/addons/mail/static/src/core/common/attachment_service.js b/addons/mail/static/src/core/common/attachment_service.js
index 9dab855c953..d8966b97904 100644
--- a/addons/mail/static/src/core/common/attachment_service.js
+++ b/addons/mail/static/src/core/common/attachment_service.js
@@ -38,6 +38,7 @@ export class AttachmentService {
     update(attachment, data) {
         assignDefined(attachment, data, [
             "checksum",
+            "create_date",
             "filename",
             "mimetype",
             "name",
diff --git a/addons/mail/static/src/core/common/date_section.js b/addons/mail/static/src/core/common/date_section.js
new file mode 100644
index 00000000000..403fc4181a2
--- /dev/null
+++ b/addons/mail/static/src/core/common/date_section.js
@@ -0,0 +1,13 @@
+/* @odoo-module */
+
+import { Component } from "@odoo/owl";
+
+/**
+ * @typedef {Object} Props
+ * @property {string} date
+ * @property {string} [className]
+ */
+export class DateSection extends Component {
+    static template = "mail.DateSection";
+    static props = ["date", "className?"];
+}
diff --git a/addons/mail/static/src/core/common/date_section.scss b/addons/mail/static/src/core/common/date_section.scss
new file mode 100644
index 00000000000..9b74ad1d538
--- /dev/null
+++ b/addons/mail/static/src/core/common/date_section.scss
@@ -0,0 +1,3 @@
+.o-mail-DateSection hr {
+    opacity: $hr-opacity / 2;
+}
diff --git a/addons/mail/static/src/core/common/date_section.xml b/addons/mail/static/src/core/common/date_section.xml
new file mode 100644
index 00000000000..13cbe5d3f77
--- /dev/null
+++ b/addons/mail/static/src/core/common/date_section.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<templates xml:space="preserve">
+
+<t t-name="mail.DateSection">
+    <div class="o-mail-DateSection d-flex align-items-center fw-bolder w-100" t-attf-class="{{ props.className }}">
+        <hr class="ms-3 flex-grow-1"/>
+        <span class="px-3 text-muted"><t t-esc="props.date"/></span>
+        <hr class="me-3 flex-grow-1"/>
+    </div>
+</t>
+</templates>
diff --git a/addons/mail/static/src/core/common/thread.js b/addons/mail/static/src/core/common/thread.js
index 805dc458501..8184c5023ce 100644
--- a/addons/mail/static/src/core/common/thread.js
+++ b/addons/mail/static/src/core/common/thread.js
@@ -1,5 +1,6 @@
 /* @odoo-module */
 
+import { DateSection } from "@mail/core/common/date_section";
 import { Message } from "@mail/core/common/message";
 import {
     useAutoScroll,
@@ -35,7 +36,7 @@ export const PRESENT_THRESHOLD = 2500;
  * @extends {Component<Props, Env>}
  */
 export class Thread extends Component {
-    static components = { Message, Transition };
+    static components = { Message, Transition, DateSection };
     static props = [
         "isInChatWindow?",
         "hasScrollAdjust?",
diff --git a/addons/mail/static/src/core/common/thread.scss b/addons/mail/static/src/core/common/thread.scss
index 80ab34e1c4a..4699ff2b58e 100644
--- a/addons/mail/static/src/core/common/thread.scss
+++ b/addons/mail/static/src/core/common/thread.scss
@@ -1,7 +1,3 @@
-.o-mail-Thread-date hr {
-    opacity: $hr-opacity / 2;
-}
-
 .o-mail-Thread-newMessage {
     transition: opacity 0.5s;
 
diff --git a/addons/mail/static/src/core/common/thread.xml b/addons/mail/static/src/core/common/thread.xml
index 95beb8e49a4..37e5fa37755 100644
--- a/addons/mail/static/src/core/common/thread.xml
+++ b/addons/mail/static/src/core/common/thread.xml
@@ -19,11 +19,7 @@
                 </t>
                 <t t-foreach="props.order === 'asc' ? props.thread.nonEmptyMessages : [...props.thread.nonEmptyMessages].reverse()" t-as="msg" t-key="msg.id">
                     <t t-if="msg.dateDay !== currentDay">
-                        <div class="o-mail-Thread-date d-flex align-items-center fw-bolder pt-4">
-                            <hr class="ms-3 flex-grow-1"/>
-                            <span class="px-3 text-muted"><t t-esc="msg.dateDay"/></span>
-                            <hr class="me-3 flex-grow-1"/>
-                        </div>
+                        <DateSection date="msg.dateDay" className="'pt-4'"/>
                         <t t-set="currentDay" t-value="msg.dateDay"/>
                     </t>
                     <Transition t-if="props.thread.isChannel"  visible="props.thread.seen_message_id === (prevMsg?.id ?? false)" name="'o-fade'" t-slot-scope="transition">
diff --git a/addons/mail/static/src/core/common/thread_model.js b/addons/mail/static/src/core/common/thread_model.js
index 907e46c4743..c25c3512242 100644
--- a/addons/mail/static/src/core/common/thread_model.js
+++ b/addons/mail/static/src/core/common/thread_model.js
@@ -204,6 +204,10 @@ export class Thread extends Record {
         return ["channel", "group"].includes(this.type);
     }
 
+    get hasAttachmentPanel() {
+        return this.model === "discuss.channel";
+    }
+
     get isChatChannel() {
         return ["chat", "group"].includes(this.type);
     }
diff --git a/addons/mail/static/src/discuss/core/common/attachment_panel.js b/addons/mail/static/src/discuss/core/common/attachment_panel.js
new file mode 100644
index 00000000000..3fba3a77d30
--- /dev/null
+++ b/addons/mail/static/src/discuss/core/common/attachment_panel.js
@@ -0,0 +1,50 @@
+/* @odoo-module */
+
+import { DateSection } from "@mail/core/common/date_section";
+import { ActionPanel } from "@mail/discuss/core/common/action_panel";
+import { AttachmentList } from "@mail/core/common/attachment_list";
+
+import { Component, onWillStart, onWillUpdateProps } from "@odoo/owl";
+import { useService } from "@web/core/utils/hooks";
+import { useVisible } from "@mail/utils/common/hooks";
+
+/**
+ * @typedef {Object} Props
+ * @property {import("@mail/core/common/thread_model").Thread} thread
+ */
+export class AttachmentPanel extends Component {
+    static components = { ActionPanel, AttachmentList, DateSection };
+    static props = ["thread"];
+    static template = "mail.AttachmentPanel";
+
+    setup() {
+        this.threadService = useService("mail.thread");
+        this.attachmentUploadService = useService("mail.attachment_upload");
+        onWillStart(() => {
+            this.threadService.fetchMoreAttachments(this.props.thread);
+        });
+        onWillUpdateProps((nextProps) => {
+            if (nextProps.thread.notEq(this.props.thread)) {
+                this.threadService.fetchMoreAttachments(nextProps.thread);
+            }
+        });
+        const loadOlderState = useVisible("load-older", () => {
+            if (loadOlderState.isVisible) {
+                this.threadService.fetchMoreAttachments(this.props.thread);
+            }
+        });
+    }
+
+    /**
+     * @return {Object<string, import("@mail/core/common/attachment_model").Attachment[]>}
+     */
+    get attachmentsByDate() {
+        const attachmentsByDate = {};
+        for (const attachment of this.props.thread.attachments) {
+            const attachments = attachmentsByDate[attachment.monthYear] ?? [];
+            attachments.push(attachment);
+            attachmentsByDate[attachment.monthYear] = attachments;
+        }
+        return attachmentsByDate;
+    }
+}
diff --git a/addons/mail/static/src/discuss/core/common/attachment_panel.xml b/addons/mail/static/src/discuss/core/common/attachment_panel.xml
new file mode 100644
index 00000000000..e71f58ddaee
--- /dev/null
+++ b/addons/mail/static/src/discuss/core/common/attachment_panel.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+
+    <t t-name="mail.AttachmentPanel">
+        <t t-set="title">Attachments</t>
+        <ActionPanel title="title">
+            <div class="flex-grow-1" t-att-class="{
+                'd-flex justify-content-center align-items-center': props.thread.attachments.length === 0,
+            }">
+                <p t-if="props.thread.attachments.length === 0" class="text-center fst-italic text-500">
+                    <t t-if="props.thread.type === 'channel'">This channel doesn't have any attachments.</t>
+                    <t t-else="">This conversation doesn't have any attachments.</t>
+                </p>
+                <div t-else="" t-foreach="attachmentsByDate" t-as="dateDay" t-key="dateDay" class="d-flex flex-column">
+                    <DateSection date="dateDay" className="'my-1'"/>
+                    <AttachmentList imagesHeight="100" attachments="dateDay_value" unlinkAttachment="(attachment) => this.attachmentUploadService.unlink(attachment)"/>
+                </div>
+            </div>
+            <span t-ref="load-older"/>
+        </ActionPanel>
+    </t>
+</templates>
diff --git a/addons/mail/static/src/discuss/core/common/thread_actions.js b/addons/mail/static/src/discuss/core/common/thread_actions.js
index 343b8769584..d7e70378fea 100644
--- a/addons/mail/static/src/discuss/core/common/thread_actions.js
+++ b/addons/mail/static/src/discuss/core/common/thread_actions.js
@@ -1,6 +1,7 @@
 /* @odoo-module */
 
 import { threadActionsRegistry } from "@mail/core/common/thread_actions";
+import { AttachmentPanel } from "@mail/discuss/core/common/attachment_panel";
 import { ChannelInvitation } from "@mail/discuss/core/common/channel_invitation";
 import { ChannelMemberList } from "@mail/discuss/core/common/channel_member_list";
 
@@ -10,6 +11,18 @@ import { _t } from "@web/core/l10n/translation";
 import { usePopover } from "@web/core/popover/popover_hook";
 
 threadActionsRegistry
+    .add("attachments", {
+        condition: (component) =>
+            component.thread?.hasAttachmentPanel &&
+            (!component.props.chatWindow || component.props.chatWindow.isOpen),
+        component: AttachmentPanel,
+        icon: "fa fa-fw fa-paperclip",
+        iconLarge: "fa fa-fw fa-lg fa-paperclip",
+        name: _t("Show Attachments"),
+        nameActive: _t("Hide Attachments"),
+        sequence: 25,
+        toggle: true,
+    })
     .add("add-users", {
         close(component, action) {
             action.popover?.close();
diff --git a/addons/mail/static/src/discuss/core/common/thread_service_patch.js b/addons/mail/static/src/discuss/core/common/thread_service_patch.js
index 0f0f77bf723..d1cd148deed 100644
--- a/addons/mail/static/src/discuss/core/common/thread_service_patch.js
+++ b/addons/mail/static/src/discuss/core/common/thread_service_patch.js
@@ -27,4 +27,24 @@ patch(ThreadService.prototype, {
         }
         return super.post(...arguments);
     },
+
+    async fetchMoreAttachments(thread, limit = 30) {
+        if (thread.isLoadingAttachments || thread.areAttachmentsLoaded) {
+            return;
+        }
+        thread.isLoadingAttachments = true;
+        try {
+            const rawAttachments = await this.rpc("/discuss/channel/attachments", {
+                before: Math.min(...thread.attachments.map(({ id }) => id)),
+                channel_id: thread.id,
+                limit,
+            });
+            const attachments = rawAttachments.map((a) => this.store.Attachment.insert(a));
+            if (attachments.length < limit) {
+                thread.areAttachmentsLoaded = true;
+            }
+        } finally {
+            thread.isLoadingAttachments = false;
+        }
+    },
 });
diff --git a/addons/mail/static/src/discuss/message_pin/common/thread_actions.js b/addons/mail/static/src/discuss/message_pin/common/thread_actions.js
index 3a3c75a93b7..28c40c68c93 100644
--- a/addons/mail/static/src/discuss/message_pin/common/thread_actions.js
+++ b/addons/mail/static/src/discuss/message_pin/common/thread_actions.js
@@ -20,7 +20,7 @@ threadActionsRegistry.add("pinned-messages", {
     iconLarge: "fa fa-fw fa-lg fa-thumb-tack",
     name: _t("Pinned Messages"),
     nameActive: _t("Hide Pinned Messages"),
-    sequence: 29,
+    sequence: 20,
     setup(action) {
         useChildSubEnv({
             pinMenu: {
diff --git a/addons/mail/static/tests/chat_window/chat_window_tests.js b/addons/mail/static/tests/chat_window/chat_window_tests.js
index 3549b71a06e..67cc58a7a71 100644
--- a/addons/mail/static/tests/chat_window/chat_window_tests.js
+++ b/addons/mail/static/tests/chat_window/chat_window_tests.js
@@ -146,8 +146,9 @@ QUnit.test("chat window: basic rendering", async (assert) => {
         "There are no messages in this conversation."
     );
     await click("[title='Open Actions Menu']");
-    await contains(".o-mail-ChatWindow-command", 9);
+    await contains(".o-mail-ChatWindow-command", 10);
     await contains("[title='Pinned Messages']");
+    await contains("[title='Show Attachments']");
     await contains("[title='Add Users']");
     await contains("[title='Show Member List']");
     await contains("[title='Show Call Settings']");
diff --git a/addons/mail/static/tests/discuss/core/attachment_panel_tests.js b/addons/mail/static/tests/discuss/core/attachment_panel_tests.js
new file mode 100644
index 00000000000..6b15504515d
--- /dev/null
+++ b/addons/mail/static/tests/discuss/core/attachment_panel_tests.js
@@ -0,0 +1,44 @@
+/* @odoo-module */
+
+import { click, contains, start, startServer } from "@mail/../tests/helpers/test_utils";
+
+QUnit.module("attachment panel");
+
+QUnit.test("Empty attachment panel", async () => {
+    const pyEnv = await startServer();
+    const channelId = await pyEnv["discuss.channel"].create({ name: "General" });
+    const { openDiscuss } = await start();
+    await openDiscuss(channelId);
+    await click(".o-mail-Discuss-header button[title='Show Attachments']");
+    await contains(
+        ".o-mail-Discuss-inspector:contains(This channel doesn't have any attachments.)"
+    );
+});
+
+QUnit.test("Attachment panel sort by date", async () => {
+    const pyEnv = await startServer();
+    const channelId = await pyEnv["discuss.channel"].create({ name: "General" });
+    pyEnv["ir.attachment"].create([
+        {
+            res_id: channelId,
+            res_model: "discuss.channel",
+            name: "file1.pdf",
+            create_date: "2023-08-20",
+        },
+        {
+            res_id: channelId,
+            res_model: "discuss.channel",
+            name: "file2.pdf",
+            create_date: "2023-09-21",
+        },
+    ]);
+    const { openDiscuss } = await start();
+    await openDiscuss(channelId);
+    await click(".o-mail-Discuss-header button[title='Show Attachments']");
+    await contains(
+        ".o-mail-DateSection:contains(August, 2023) + .o-mail-AttachmentList:contains(file1.pdf)"
+    );
+    await contains(
+        ".o-mail-DateSection:contains(September, 2023) + .o-mail-AttachmentList:contains(file2.pdf)"
+    );
+});
diff --git a/addons/mail/static/tests/helpers/mock_server/controllers/channel.js b/addons/mail/static/tests/helpers/mock_server/controllers/channel.js
new file mode 100644
index 00000000000..cbcae81c0b6
--- /dev/null
+++ b/addons/mail/static/tests/helpers/mock_server/controllers/channel.js
@@ -0,0 +1,41 @@
+/* @odoo-module */
+
+import { patch } from "@web/core/utils/patch";
+import { MockServer } from "@web/../tests/helpers/mock_server";
+
+patch(MockServer.prototype, {
+    /**
+     * @override
+     */
+    async _performRPC(route, args) {
+        if (route === "/discuss/channel/attachments") {
+            return this._mockRouteDiscussChannelAttachments(
+                args.channel_id,
+                args.limit,
+                args.older_attachment_id
+            );
+        }
+        return super._performRPC(route, args);
+    },
+
+    /**
+     * Simulates the `/discuss/channel/attachments` route.
+     *
+     * @param {number} channelId
+     * @param {number} [limit=30]
+     * @param {number} [olderAttachmentId]
+     */
+    _mockRouteDiscussChannelAttachments(channelId, limit = 30, olderAttachmentId = null) {
+        const attachmentIds = this.models["ir.attachment"].records
+            .filter(
+                ({ id, res_id, res_model }) =>
+                    res_id === channelId &&
+                    res_model === "discuss.channel" &&
+                    (!olderAttachmentId || id < olderAttachmentId)
+            )
+            .sort()
+            .slice(0, limit)
+            .map(({ id }) => id);
+        return this._mockIrAttachment_attachmentFormat(attachmentIds);
+    },
+});
diff --git a/addons/mail/static/tests/helpers/mock_server/models/ir_attachment.js b/addons/mail/static/tests/helpers/mock_server/models/ir_attachment.js
index 4b1c8e928ec..c0e81f7c358 100644
--- a/addons/mail/static/tests/helpers/mock_server/models/ir_attachment.js
+++ b/addons/mail/static/tests/helpers/mock_server/models/ir_attachment.js
@@ -22,6 +22,7 @@ patch(MockServer.prototype, {
         const attachments = this.mockRead("ir.attachment", [ids]);
         return attachments.map((attachment) => {
             const res = {
+                create_date: attachment.create_date,
                 checksum: attachment.checksum,
                 filename: attachment.name,
                 id: attachment.id,
diff --git a/addons/mail/static/tests/thread/thread_tests.js b/addons/mail/static/tests/thread/thread_tests.js
index c892d63708d..cec3f3abffa 100644
--- a/addons/mail/static/tests/thread/thread_tests.js
+++ b/addons/mail/static/tests/thread/thread_tests.js
@@ -128,7 +128,7 @@ QUnit.test("display day separator before first message of the day", async () =>
     ]);
     const { openDiscuss } = await start();
     openDiscuss(channelId);
-    await contains(".o-mail-Thread-date");
+    await contains(".o-mail-DateSection");
 });
 
 QUnit.test("do not display day separator if all messages of the day are empty", async () => {
@@ -142,7 +142,7 @@ QUnit.test("do not display day separator if all messages of the day are empty",
     const { openDiscuss } = await start();
     openDiscuss(channelId);
     await contains(".o-mail-Thread-empty");
-    await contains(".o-mail-Thread-date", 0);
+    await contains(".o-mail-DateSection", 0);
 });
 
 QUnit.test("scroll position is kept when navigating from one channel to another", async () => {
diff --git a/addons/mail/tests/discuss/test_message_controller.py b/addons/mail/tests/discuss/test_message_controller.py
index ce32cf0dd30..aef39e19811 100644
--- a/addons/mail/tests/discuss/test_message_controller.py
+++ b/addons/mail/tests/discuss/test_message_controller.py
@@ -3,7 +3,7 @@
 import json
 
 import odoo
-from odoo.tools import mute_logger
+from odoo.tools import mute_logger, date_utils
 from odoo.tests import HttpCase
 
 
@@ -96,7 +96,7 @@ class TestMessageController(HttpCase):
         message_format1 = res2.json()["result"]
         self.assertEqual(
             message_format1["attachment_ids"],
-            json.loads(json.dumps(self.attachments[0]._attachment_format())),
+            json.loads(json.dumps(self.attachments[0]._attachment_format(), default=date_utils.json_default)),
             "guest should be allowed to add attachment with token when posting message",
         )
         # test message update: token error
@@ -139,7 +139,7 @@ class TestMessageController(HttpCase):
         message_format2 = res4.json()["result"]
         self.assertEqual(
             message_format2["attachment_ids"],
-            json.loads(json.dumps(self.attachments.sorted("id")._attachment_format())),
+            json.loads(json.dumps(self.attachments.sorted("id")._attachment_format(), default=date_utils.json_default)),
             "guest should be allowed to add attachment with token when updating message",
         )
         # test message update: own attachment ok
@@ -160,7 +160,7 @@ class TestMessageController(HttpCase):
         message_format3 = res5.json()["result"]
         self.assertEqual(
             message_format3["attachment_ids"],
-            json.loads(json.dumps(self.attachments.sorted("id")._attachment_format())),
+            json.loads(json.dumps(self.attachments.sorted("id")._attachment_format(), default=date_utils.json_default)),
             "guest should be allowed to add own attachment without token when updating message",
         )