diff --git a/openstackclient/image/v2/image.py b/openstackclient/image/v2/image.py
index cbb6d874de..e8d040e14c 100644
--- a/openstackclient/image/v2/image.py
+++ b/openstackclient/image/v2/image.py
@@ -1719,6 +1719,7 @@ class ImportImage(command.ShowOne):
         )
         stores_group.add_argument(
             '--all-stores',
+            action='store_true',
             help=_(
                 "Make image available to all stores "
                 "(either '--store' or '--all-stores' required with the "
diff --git a/openstackclient/tests/unit/image/v2/test_image.py b/openstackclient/tests/unit/image/v2/test_image.py
index e6de9f2ebd..c9a273ba97 100644
--- a/openstackclient/tests/unit/image/v2/test_image.py
+++ b/openstackclient/tests/unit/image/v2/test_image.py
@@ -2085,7 +2085,7 @@ class TestImageImport(TestImage):
             remote_image_id=None,
             remote_service_interface=None,
             stores=None,
-            all_stores=None,
+            all_stores=False,
             all_stores_must_succeed=False,
         )
 
@@ -2115,7 +2115,7 @@ class TestImageImport(TestImage):
             remote_image_id=None,
             remote_service_interface=None,
             stores=None,
-            all_stores=None,
+            all_stores=False,
             all_stores_must_succeed=False,
         )
 
@@ -2253,7 +2253,7 @@ class TestImageImport(TestImage):
             remote_image_id=None,
             remote_service_interface=None,
             stores=['fast'],
-            all_stores=None,
+            all_stores=False,
             all_stores_must_succeed=False,
         )
 
@@ -2285,7 +2285,7 @@ class TestImageImport(TestImage):
             remote_image_id=None,
             remote_service_interface=None,
             stores=['fast'],
-            all_stores=None,
+            all_stores=False,
             all_stores_must_succeed=True,
         )
 
@@ -2320,7 +2320,7 @@ class TestImageImport(TestImage):
             remote_image_id='remote-image-id',
             remote_service_interface='private',
             stores=None,
-            all_stores=None,
+            all_stores=False,
             all_stores_must_succeed=False,
         )
 
diff --git a/releasenotes/notes/bug-2138903-f75c7348f22db195.yaml b/releasenotes/notes/bug-2138903-f75c7348f22db195.yaml
new file mode 100644
index 0000000000..249242146d
--- /dev/null
+++ b/releasenotes/notes/bug-2138903-f75c7348f22db195.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    The ``--all-stores`` of the ``image import`` command is now correctly
+    treated as a boolean flag.