diff --git a/neutron_lib/services/constants.py b/neutron_lib/services/constants.py
index 5a5f374fe..8182f451f 100644
--- a/neutron_lib/services/constants.py
+++ b/neutron_lib/services/constants.py
@@ -13,6 +13,7 @@
 #    under the License.
 
 from neutron_lib.api.definitions import l3
+from neutron_lib.api.definitions import qos
 from neutron_lib.plugins import constants as plugin_const
 
 
@@ -26,5 +27,6 @@ from neutron_lib.plugins import constants as plugin_const
 # registered the service plugin name in neutron-lib.
 EXT_PARENT_RESOURCE_MAPPING = {
     l3.FLOATINGIP: plugin_const.L3,
-    l3.ROUTER: plugin_const.CONNTRACKHELPER
+    l3.ROUTER: plugin_const.CONNTRACKHELPER,
+    qos.POLICY: plugin_const.QOS,
 }
diff --git a/releasenotes/notes/qos-plugin-parent-resource-mapping-ab5208caba9eda01.yaml b/releasenotes/notes/qos-plugin-parent-resource-mapping-ab5208caba9eda01.yaml
new file mode 100644
index 000000000..842f9d773
--- /dev/null
+++ b/releasenotes/notes/qos-plugin-parent-resource-mapping-ab5208caba9eda01.yaml
@@ -0,0 +1,5 @@
+---
+other:
+  - |
+    Parent resource mapping was added to ``EXT_PARENT_RESOURCE_MAPPING`` in
+    ``neutron_lib.services.constants`` for the ``qos`` plugin.