diff --git a/apps/desktop/src/components/MessageBubble.tsx b/apps/desktop/src/components/MessageBubble.tsx
index 6556312..75eac9e 100644
--- a/apps/desktop/src/components/MessageBubble.tsx
+++ b/apps/desktop/src/components/MessageBubble.tsx
@@ -31,6 +31,7 @@ import {
   PencilIcon,
   PhoneIcon,
   PhoneOffIcon,
+  PinIcon,
   ReplyIcon,
   SmileIcon,
   SpinnerIcon,
@@ -76,6 +77,10 @@ interface Props {
   onAvatarClick?: (userId: string, ev: React.MouseEvent) => void;
   /** Highlighted state — set briefly after a jump. */
   highlighted?: boolean;
+  /** True iff this message is currently pinned (parent maintains the set). */
+  isPinned?: boolean;
+  /** Right-click menu → toggle pin/unpin for this message id. */
+  onTogglePin?: (messageId: string) => void;
 }
 
 export function MessageBubble({
@@ -97,6 +102,8 @@ export function MessageBubble({
   onForward,
   onAvatarClick,
   highlighted = false,
+  isPinned = false,
+  onTogglePin,
 }: Props) {
   const { t } = useTranslation(['app']);
   const { session } = useAuth();
@@ -642,6 +649,15 @@ export function MessageBubble({
               setContextMenu(null);
               void handleDelete();
             }}
+            isPinned={isPinned}
+            {...(onTogglePin
+              ? {
+                  onTogglePin: () => {
+                    setContextMenu(null);
+                    onTogglePin(message.id);
+                  },
+                }
+              : {})}
           />
         )}
       </div>
@@ -739,6 +755,8 @@ function MessageContextMenu({
   onEdit,
   onCopy,
   onDelete,
+  isPinned,
+  onTogglePin,
 }: {
   x: number;
   y: number;
@@ -753,6 +771,8 @@ function MessageContextMenu({
   onEdit: () => void;
   onCopy: () => void;
   onDelete: () => void;
+  isPinned?: boolean;
+  onTogglePin?: () => void;
 }) {
   useEffect(() => {
     function onKey(e: KeyboardEvent) {
@@ -819,6 +839,13 @@ function MessageContextMenu({
           tone="danger"
         />
       )}
+      {onTogglePin && (
+        <MenuItem
+          label={isPinned ? 'Anheftung entfernen' : 'Anpinnen'}
+          icon={<PinIcon className="h-4 w-4" />}
+          onClick={onTogglePin}
+        />
+      )}
     </div>,
     document.body,
   );
diff --git a/apps/desktop/src/pages/ConversationPage.tsx b/apps/desktop/src/pages/ConversationPage.tsx
index 5186d44..61dbbd2 100644
--- a/apps/desktop/src/pages/ConversationPage.tsx
+++ b/apps/desktop/src/pages/ConversationPage.tsx
@@ -1,4 +1,4 @@
-import { parseMessagePayload } from '@chat-app/shared/chat';
+import { parseMessagePayload, pinMessage, unpinMessage } from '@chat-app/shared/chat';
 import { extractErrorCode } from '@chat-app/shared/i18n';
 import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import { useTranslation } from 'react-i18next';
@@ -29,6 +29,7 @@ import { CallPreviewPanel } from '../components/CallPreviewPanel';
 import { MediaFilesDrawer } from '../components/MediaFilesDrawer';
 import { MentionAutocomplete } from '../components/MentionAutocomplete';
 import { MessageBubble, type QuotedRef } from '../components/MessageBubble';
+import { PinnedMessagesPanel } from '../components/PinnedMessagesPanel';
 import { PollComposerDialog } from '../components/PollComposerDialog';
 import { UserProfilePopover } from '../components/UserProfilePopover';
 import { TypingIndicator } from '../components/TypingIndicator';
@@ -41,6 +42,7 @@ import { collectConversationAttachments, createPollPayload } from '../lib/conver
 import { compressImages } from '../lib/imageCompress';
 import { ensureInstallId } from '../lib/installId';
 import { searchCachedMessages } from '../lib/messageCache';
+import { supabase } from '../lib/supabase';
 import type { OutboxItem } from '../lib/messageOutbox';
 import { useConversationMessages } from '../lib/useConversationMessages';
 import { useMessageReactions } from '../lib/useMessageReactions';
@@ -48,6 +50,7 @@ import { useGroupReceipts } from '../lib/useGroupReceipts';
 import { markDelivered, useMessageDeliveries } from '../lib/useMessageDeliveries';
 import { markRead as markMessagesReadRemote, useMessageReads } from '../lib/useMessageReads';
 import { usePeerPresence } from '../lib/usePeerPresence';
+import { usePinnedMessages } from '../lib/usePinnedMessages';
 import { useTypingChannel } from '../lib/useTypingChannel';
 
 const STICK_THRESHOLD = 80;
@@ -177,6 +180,25 @@ export function ConversationPage() {
   } | null>(null);
   const [mentionState, setMentionState] = useState<{ query: string; start: number } | null>(null);
   const [emojiOpen, setEmojiOpen] = useState(false);
+  const pins = usePinnedMessages(id);
+  const [pinnedPanelOpen, setPinnedPanelOpen] = useState(false);
+  const pinnedIds = useMemo(() => new Set(pins.map((p) => p.messageId)), [pins]);
+
+  const handleTogglePin = useCallback(
+    async (messageId: string) => {
+      if (!id || !myId) return;
+      try {
+        if (pinnedIds.has(messageId)) {
+          await unpinMessage(supabase, id, messageId);
+        } else {
+          await pinMessage(supabase, id, messageId, myId);
+        }
+      } catch (err) {
+        console.warn('pin toggle failed', err);
+      }
+    },
+    [id, myId, pinnedIds],
+  );
   const scrollRef = useRef<HTMLDivElement>(null);
   const loadMoreSentinelRef = useRef<HTMLDivElement>(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
@@ -605,6 +627,8 @@ export function ConversationPage() {
             : {})}
           onSearchClick={() => setSearchOpen((v) => !v)}
           {...(isGroup ? { onInfoClick: () => setInfoPanelOpen(true) } : {})}
+          pinnedCount={pins.length}
+          onOpenPinned={() => setPinnedPanelOpen(true)}
         />
       )}
 
@@ -757,6 +781,8 @@ export function ConversationPage() {
                       });
                     }}
                     highlighted={highlightedId === m.id}
+                    isPinned={pinnedIds.has(m.id)}
+                    onTogglePin={handleTogglePin}
                   />
                 </li>
               );
@@ -1068,6 +1094,17 @@ export function ConversationPage() {
           onClose={() => setProfilePopover(null)}
         />
       )}
+
+      <PinnedMessagesPanel
+        open={pinnedPanelOpen}
+        pins={pins}
+        onClose={() => setPinnedPanelOpen(false)}
+        onJump={(_messageId) => {
+          // Future: scroll to message. For now just close the panel.
+          setPinnedPanelOpen(false);
+        }}
+        onUnpin={(messageId) => void handleTogglePin(messageId)}
+      />
     </div>
   );
 }