diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index 6e5c6117023..2d27b380386 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -2176,6 +2176,9 @@
   height: auto;
   line-height: 16px;
 }
+.openerp .oe_form_field_one2many .oe_list_buttons.oe_editing .oe_list_save {
+  visibility: hidden;
+}
 .openerp .oe_form .oe_form_field_many2many > .oe_list .oe_list_pager_single_page {
   display: none;
 }
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index 83153cc11d5..52b28b7da4f 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -1715,6 +1715,9 @@ $sheet-max-width: 860px
                         li
                             height: auto
                             line-height: 16px
+        .oe_list_buttons.oe_editing .oe_list_save
+            // keep "save row" button hidden in o2m
+            visibility: hidden
     // }}}
     // FormView.many2many {{{
     .oe_form .oe_form_field_many2many > .oe_list