diff --git a/adminfront/src/features/user-groups/routes/TenantUserGroupsTab.tsx b/adminfront/src/features/user-groups/routes/TenantUserGroupsTab.tsx
index 03533254..6ce2eafa 100644
--- a/adminfront/src/features/user-groups/routes/TenantUserGroupsTab.tsx
+++ b/adminfront/src/features/user-groups/routes/TenantUserGroupsTab.tsx
@@ -56,9 +56,11 @@ import {
   TabsTrigger,
 } from "../../../components/ui/tabs";
 import {
+  type GroupSummary,
   type TenantSummary,
   type UserSummary,
   createUser,
+  fetchGroups,
   fetchTenants,
   fetchUsers,
   updateTenant,
@@ -705,7 +707,15 @@ const TenantTreeRow: React.FC<{
               variant="ghost"
               size="icon"
               className="h-8 w-8"
-              onClick={() => navigate(`/tenants/${node.id}`)}
+              onClick={() => {
+                if (node.type === "USER_GROUP") {
+                  // User groups have a different detail path
+                  const baseTenantId = node.tenantId || tenantId;
+                  navigate(`/tenants/${baseTenantId}/organization/${node.id}`);
+                } else {
+                  navigate(`/tenants/${node.id}`);
+                }
+              }}
               title={t("ui.common.manage", "관리")}
             >
               <ArrowRight size={14} />
@@ -760,6 +770,23 @@ function TenantUserGroupsTab() {
     queryFn: () => fetchTenants(1000, 0),
   });
 
+  const { data: groupsData, isLoading: isGroupsLoading } = useQuery({
+    queryKey: ["tenant-groups", tenantId],
+    queryFn: () => fetchGroups(tenantId),
+    enabled: !!tenantId,
+  });
+
+  const groupNodes = useMemo(() => {
+    if (!groupsData) return [];
+    return groupsData.map((g) => ({
+      ...g,
+      type: "USER_GROUP",
+      children: [], // Simplified for now, just a list or separate tree
+      memberCount: g.members?.length || 0,
+      recursiveMemberCount: g.members?.length || 0,
+    })) as unknown as TenantNode[];
+  }, [groupsData]);
+
   const updateParentMutation = useMutation({
     mutationFn: ({
       id,
@@ -775,10 +802,17 @@ function TenantUserGroupsTab() {
 
   const allTenants = data?.items ?? [];
 
-  const { currentBase, subTree } = useMemo(
-    () => buildTenantFullTree(allTenants, tenantId),
-    [allTenants, tenantId],
-  );
+  const { currentBase, subTree } = useMemo(() => {
+    const tree = buildTenantFullTree(allTenants, tenantId);
+    if (tree.currentBase) {
+      // Merge backend-provided UserGroups into the tree as virtual children
+      tree.currentBase.children = [
+        ...tree.currentBase.children,
+        ...groupNodes,
+      ];
+    }
+    return tree;
+  }, [allTenants, tenantId, groupNodes]);
 
   const handleAdd = (id: string) =>
     updateParentMutation.mutate({ id, parentId: tenantId });