diff --git a/setup.cfg b/setup.cfg
index a6c4faa..699e39b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -54,6 +54,7 @@ openstack.infra_optim.v1 =
     optimize_actionplan_create = watcherclient.v1.action_plan_shell:CreateActionPlan
     optimize_actionplan_update = watcherclient.v1.action_plan_shell:UpdateActionPlan
     optimize_actionplan_start = watcherclient.v1.action_plan_shell:StartActionPlan
+    optimize_actionplan_cancel = watcherclient.v1.action_plan_shell:CancelActionPlan
 
     optimize_action_show = watcherclient.v1.action_shell:ShowAction
     optimize_action_list = watcherclient.v1.action_shell:ListAction
@@ -90,6 +91,7 @@ watcherclient.v1 =
     actionplan_update = watcherclient.v1.action_plan_shell:UpdateActionPlan
     actionplan_start = watcherclient.v1.action_plan_shell:StartActionPlan
     actionplan_delete = watcherclient.v1.action_plan_shell:DeleteActionPlan
+    actionplan_cancel = watcherclient.v1.action_plan_shell:CancelActionPlan
 
     action_show = watcherclient.v1.action_shell:ShowAction
     action_list = watcherclient.v1.action_shell:ListAction
diff --git a/watcherclient/tests/unit/v1/test_action_plan_shell.py b/watcherclient/tests/unit/v1/test_action_plan_shell.py
index d36de96..4a05d4f 100644
--- a/watcherclient/tests/unit/v1/test_action_plan_shell.py
+++ b/watcherclient/tests/unit/v1/test_action_plan_shell.py
@@ -257,3 +257,25 @@ class ActionPlanShellTest(base.CommandTestCase):
 
         self.assertEqual(1, exit_code)
         self.assertEqual('', result)
+
+    def test_do_action_plan_cancel(self):
+        action_plan = resource.ActionPlan(mock.Mock(), ACTION_PLAN_1)
+        self.m_action_plan_mgr.cancel.return_value = action_plan
+
+        exit_code, result = self.run_cmd(
+            'actionplan cancel 5869da81-4876-4687-a1ed-12cd64cf53d9')
+
+        self.assertEqual(0, exit_code)
+        self.assertEqual(
+            self.resource_as_dict(action_plan, self.FIELDS, self.FIELD_LABELS),
+            result)
+        self.m_action_plan_mgr.cancel.assert_called_once_with(
+            '5869da81-4876-4687-a1ed-12cd64cf53d9')
+
+    def test_do_action_plan_cancel_not_uuid(self):
+        exit_code, result = self.run_cmd(
+            'actionplan cancel not_uuid',
+            formatting=None)
+
+        self.assertEqual(1, exit_code)
+        self.assertEqual('', result)
diff --git a/watcherclient/v1/action_plan.py b/watcherclient/v1/action_plan.py
index 411ddde..3caa8c1 100644
--- a/watcherclient/v1/action_plan.py
+++ b/watcherclient/v1/action_plan.py
@@ -89,3 +89,12 @@ class ActionPlanManager(base.Manager):
     def start(self, action_plan_id):
         patch = [{'op': 'replace', 'value': 'PENDING', 'path': '/state'}]
         return self._update(self._path(action_plan_id), patch)
+
+    def cancel(self, action_plan_id):
+        action_plan = self.get(action_plan_id)
+        if action_plan.state == "ONGOING":
+            patch = [{'op': 'replace', 'value': 'CANCELLING',
+                      'path': '/state'}]
+        else:
+            patch = [{'op': 'replace', 'value': 'CANCELLED', 'path': '/state'}]
+        return self._update(self._path(action_plan_id), patch)
diff --git a/watcherclient/v1/action_plan_shell.py b/watcherclient/v1/action_plan_shell.py
index 435f76e..5f5af88 100644
--- a/watcherclient/v1/action_plan_shell.py
+++ b/watcherclient/v1/action_plan_shell.py
@@ -301,3 +301,29 @@ class DeleteActionPlan(command.Command):
                 raise exceptions.ValidationError()
 
             client.action_plan.delete(action_plan)
+
+
+class CancelActionPlan(command.ShowOne):
+    """Cancel action plan command."""
+
+    def get_parser(self, prog_name):
+        parser = super(CancelActionPlan, self).get_parser(prog_name)
+        parser.add_argument(
+            'action_plan',
+            metavar='<action-plan>',
+            help=_("UUID of the action_plan."))
+
+        return parser
+
+    def take_action(self, parsed_args):
+        client = getattr(self.app.client_manager, "infra-optim")
+
+        if not uuidutils.is_uuid_like(parsed_args.action_plan):
+            raise exceptions.ValidationError()
+
+        action_plan = client.action_plan.cancel(parsed_args.action_plan)
+
+        columns = res_fields.ACTION_PLAN_FIELDS
+        column_headers = res_fields.ACTION_PLAN_FIELD_LABELS
+
+        return column_headers, utils.get_item_properties(action_plan, columns)