diff --git a/src/components/rooms/RoomModal.tsx b/src/components/rooms/RoomModal.tsx
index 52831c4..765cc8b 100644
--- a/src/components/rooms/RoomModal.tsx
+++ b/src/components/rooms/RoomModal.tsx
@@ -49,9 +49,10 @@ interface RoomModalProps {
   categories?: { id: string; name: string }[]
   onClose: () => void
   onSave: (room: Room) => void
+  error?: string | null
 }
 
-export function RoomModal({ open, room, categories = [], onClose, onSave }: RoomModalProps) {
+export function RoomModal({ open, room, categories = [], onClose, onSave, error }: RoomModalProps) {
   const isEdit = !!room
   const [tab, setTab] = useState<ModalTab>('main')
 
@@ -164,6 +165,9 @@ export function RoomModal({ open, room, categories = [], onClose, onSave }: Room
       size="xl"
       footer={
         <>
+          {error && (
+            <p className="text-sm text-red-600 dark:text-red-400 flex-1 text-left">{error}</p>
+          )}
           <button onClick={onClose} className="btn-secondary">Отмена</button>
           <button onClick={handleSave} className="btn-primary" disabled={!form.number}>
             {isEdit ? 'Сохранить' : 'Добавить номер'}
diff --git a/src/pages/RoomsPage.tsx b/src/pages/RoomsPage.tsx
index bbebce3..79aa099 100644
--- a/src/pages/RoomsPage.tsx
+++ b/src/pages/RoomsPage.tsx
@@ -62,7 +62,10 @@ export function RoomsPage() {
     setModalOpen(true)
   }
 
+  const [saveError, setSaveError] = useState<string | null>(null)
+
   const handleSave = async (room: Room) => {
+    setSaveError(null)
     try {
       const isNew = !rooms.find(r => r.id === room.id)
       if (isNew) {
@@ -90,7 +93,12 @@ export function RoomsPage() {
       }
       setModalOpen(false)
     } catch (err) {
-      console.error('Failed to save room:', err)
+      const msg = err instanceof Error ? err.message : 'Ошибка сохранения'
+      setSaveError(
+        msg.includes('already exists') || msg.includes('duplicate') || msg.includes('unique')
+          ? `Номер «${room.number}» уже существует`
+          : msg,
+      )
     }
   }
 
@@ -275,9 +283,10 @@ export function RoomsPage() {
       <RoomModal
         open={modalOpen}
         room={editingRoom}
-        onClose={() => setModalOpen(false)}
+        onClose={() => { setModalOpen(false); setSaveError(null) }}
         onSave={handleSave}
         categories={MOCK_CATEGORIES}
+        error={saveError}
       />
     </div>
   )