diff --git a/fastapi_restful/cbv.py b/fastapi_restful/cbv.py
index fbcaf35e..c354ea77 100644
--- a/fastapi_restful/cbv.py
+++ b/fastapi_restful/cbv.py
@@ -106,8 +106,10 @@ def _register_endpoints(router: APIRouter, cls: Type[Any], *urls: str) -> None:
         for route in router.routes
         if isinstance(route, (Route, WebSocketRoute)) and route.endpoint in functions_set
     ]
+    prefix_length = len(router.prefix)  # Until 'black' would fix an issue which causes PEP8: E203
     for route in cbv_routes:
         router.routes.remove(route)
+        route.path = route.path[prefix_length:]
         _update_cbv_route_endpoint_signature(cls, route)
         cbv_router.routes.append(route)
     router.include_router(cbv_router)
diff --git a/tests/test_cbv.py b/tests/test_cbv.py
index 0619c3bb..dafd1a5b 100644
--- a/tests/test_cbv.py
+++ b/tests/test_cbv.py
@@ -82,3 +82,18 @@ def root(self, item_path: str = None, item_query: str = None) -> Any:
     assert client.get("/items").json() == []
     assert client.get("/items/1").json() == {"item_path": "1"}
     assert client.get("/database/abc").json() == {"item_path": "abc"}
+
+
+def test_prefix() -> None:
+    router = APIRouter(prefix="/api")
+
+    @cbv(router)
+    class RootHandler:
+        @router.get("/item")
+        def root(self) -> str:
+            return "hello"
+
+    client = TestClient(router)
+    response = client.get("/api/item")
+    assert response.status_code == 200
+    assert response.json() == "hello"