diff --git a/addons/web/static/src/views/basic_relational_model.js b/addons/web/static/src/views/basic_relational_model.js
index ef55c07b1eb..9a9c4b3ec43 100644
--- a/addons/web/static/src/views/basic_relational_model.js
+++ b/addons/web/static/src/views/basic_relational_model.js
@@ -108,6 +108,7 @@ function mapActiveFieldsToFieldsInfo(activeFields, fields, viewType) {
             domain,
             context: fieldDescr.context,
             fieldDependencies: {}, // ??
+            force_save: fieldDescr.forceSave,
             mode: fieldDescr.viewMode,
             modifiers: fieldDescr.modifiers,
             name: fieldName,
diff --git a/addons/web/static/src/views/fields/field.js b/addons/web/static/src/views/fields/field.js
index c3d177aac3b..9282d2af818 100644
--- a/addons/web/static/src/views/fields/field.js
+++ b/addons/web/static/src/views/fields/field.js
@@ -202,6 +202,7 @@ Field.parseFieldNode = function (node, models, modelName, viewType, jsClass) {
         modifiers: JSON.parse(node.getAttribute("modifiers") || "{}"),
         onChange: archParseBoolean(node.getAttribute("on_change")),
         FieldComponent: getFieldClassFromRegistry(fields[name].type, widget, viewType, jsClass),
+        forceSave: archParseBoolean(node.getAttribute("force_save")),
         decorations: {}, // populated below
         noLabel: archParseBoolean(node.getAttribute("nolabel")),
         props: {},
diff --git a/addons/web/static/src/views/relational_model.js b/addons/web/static/src/views/relational_model.js
index 1679d5e6e4c..f8ab91d4dac 100644
--- a/addons/web/static/src/views/relational_model.js
+++ b/addons/web/static/src/views/relational_model.js
@@ -641,7 +641,12 @@ export class Record extends DataPoint {
     getChanges(allFields = false, parentChanges = false) {
         const changes = { ...(allFields ? this.data : this._changes) };
         for (const fieldName in changes) {
-            if (!allFields && fieldName in this.activeFields && this.isReadonly(fieldName)) {
+            if (
+                !allFields &&
+                fieldName in this.activeFields &&
+                !this.activeFields[fieldName].forceSave &&
+                this.isReadonly(fieldName)
+            ) {
                 delete changes[fieldName];
                 continue;
             }
diff --git a/addons/web/static/tests/views/form/form_view_tests.js b/addons/web/static/tests/views/form/form_view_tests.js
index 1e167f2b532..adcbdec4397 100644
--- a/addons/web/static/tests/views/form/form_view_tests.js
+++ b/addons/web/static/tests/views/form/form_view_tests.js
@@ -6119,6 +6119,45 @@ QUnit.module("Views", (hooks) => {
         );
     });
 
+    QUnit.test("readonly sub fields fields with force_save attribute", async function (assert) {
+        assert.expect(1);
+
+        serverData.models.partner.fields.foo.readonly = true;
+        serverData.models.partner.fields.int_field.readonly = true;
+        await makeView({
+            type: "form",
+            resModel: "partner",
+            serverData,
+            arch: `
+                <form>
+                    <field name="p">
+                        <tree editable="bottom">
+                            <field name="foo" force_save="1"/>
+                            <field name="int_field"/>
+                            <field name="qux"/>
+                        </tree>
+                    </field>
+                </form>`,
+            mockRPC(route, args) {
+                if (args.method === "create") {
+                    // foo should be saved because of the "force_save" attribute
+                    // qux should be saved because it isn't readonly
+                    // int_field should not be saved as it is readonly
+                    assert.deepEqual(args.args[0].p, [[0, 1, { foo: "some value", qux: 6.5 }]]);
+                }
+                if (args.method === "onchange") {
+                    return {
+                        value: {
+                            p: [[5], [0, 1, { foo: "some value", int_field: 44, qux: 6.5 }]],
+                        },
+                    };
+                }
+            },
+        });
+
+        await click(target.querySelector(".o_form_button_save"));
+    });
+
     QUnit.test("readonly set by modifier do not break many2many_tags", async function (assert) {
         serverData.models.partner.onchanges = {
             bar: function (obj) {