diff --git a/api/v1/memo.go b/api/v1/memo.go
index 28ddc9f6..59b01cc8 100644
--- a/api/v1/memo.go
+++ b/api/v1/memo.go
@@ -625,6 +625,13 @@ func (s *APIV1Service) DeleteMemo(c echo.Context) error {
 		return echo.NewHTTPError(http.StatusUnauthorized, "Unauthorized")
 	}
 
+	if memoMessage, err := s.convertMemoFromStore(ctx, memo); err == nil {
+		// Try to dispatch webhook when memo is deleted.
+		if err := s.DispatchMemoDeletedWebhook(ctx, memoMessage); err != nil {
+			log.Warn("Failed to dispatch memo deleted webhook", zap.Error(err))
+		}
+	}
+
 	if err := s.Store.DeleteMemo(ctx, &store.DeleteMemo{
 		ID: memoID,
 	}); err != nil {
@@ -958,6 +965,11 @@ func (s *APIV1Service) DispatchMemoUpdatedWebhook(ctx context.Context, memo *Mem
 	return s.dispatchMemoRelatedWebhook(ctx, memo, "memos.memo.updated")
 }
 
+// DispatchMemoDeletedWebhook dispatches webhook when memo is deletedd.
+func (s *APIV1Service) DispatchMemoDeletedWebhook(ctx context.Context, memo *Memo) error {
+	return s.dispatchMemoRelatedWebhook(ctx, memo, "memos.memo.deleted")
+}
+
 func (s *APIV1Service) dispatchMemoRelatedWebhook(ctx context.Context, memo *Memo, activityType string) error {
 	webhooks, err := s.Store.ListWebhooks(ctx, &store.FindWebhook{
 		CreatorID: &memo.CreatorID,
diff --git a/api/v2/memo_service.go b/api/v2/memo_service.go
index 257c9553..b3f18e0b 100644
--- a/api/v2/memo_service.go
+++ b/api/v2/memo_service.go
@@ -346,6 +346,13 @@ func (s *APIV2Service) DeleteMemo(ctx context.Context, request *apiv2pb.DeleteMe
 		return nil, status.Errorf(codes.PermissionDenied, "permission denied")
 	}
 
+	if memoMessage, err := s.convertMemoFromStore(ctx, memo); err == nil {
+		// Try to dispatch webhook when memo is deleted.
+		if err := s.DispatchMemoDeletedWebhook(ctx, memoMessage); err != nil {
+			log.Warn("Failed to dispatch memo deleted webhook", zap.Error(err))
+		}
+	}
+
 	if err = s.Store.DeleteMemo(ctx, &store.DeleteMemo{
 		ID: request.Id,
 	}); err != nil {
@@ -740,6 +747,11 @@ func (s *APIV2Service) DispatchMemoUpdatedWebhook(ctx context.Context, memo *api
 	return s.dispatchMemoRelatedWebhook(ctx, memo, "memos.memo.updated")
 }
 
+// DispatchMemoDeletedWebhook dispatches webhook when memo is deleted.
+func (s *APIV2Service) DispatchMemoDeletedWebhook(ctx context.Context, memo *apiv2pb.Memo) error {
+	return s.dispatchMemoRelatedWebhook(ctx, memo, "memos.memo.deleted")
+}
+
 func (s *APIV2Service) dispatchMemoRelatedWebhook(ctx context.Context, memo *apiv2pb.Memo, activityType string) error {
 	webhooks, err := s.Store.ListWebhooks(ctx, &store.FindWebhook{
 		CreatorID: &memo.CreatorId,