diff --git a/zunclient/v1/services.py b/zunclient/v1/services.py
index 6356a519..85ced3e3 100644
--- a/zunclient/v1/services.py
+++ b/zunclient/v1/services.py
@@ -89,11 +89,14 @@ class ServiceManager(base.Manager):
                                            **kwargs)
         return resp, body
 
-    def _update_body(self, host, binary, disabled_reason=None):
+    def _update_body(self, host, binary, disabled_reason=None,
+                     force_down=None):
         body = {"host": host,
                 "binary": binary}
         if disabled_reason is not None:
             body["disabled_reason"] = disabled_reason
+        if force_down is not None:
+            body["forced_down"] = force_down
         return body
 
     def enable(self, host, binary):
@@ -105,3 +108,8 @@ class ServiceManager(base.Manager):
         """Disable the service specified by hostname and binary."""
         body = self._update_body(host, binary, reason)
         return self._action("/disable", qparams=body)
+
+    def force_down(self, host, binary, force_down=None):
+        """Force service state to down specified by hostname and binary."""
+        body = self._update_body(host, binary, force_down=force_down)
+        return self._action("/force_down", qparams=body)
diff --git a/zunclient/v1/services_shell.py b/zunclient/v1/services_shell.py
index 41bc9a38..44a261c9 100644
--- a/zunclient/v1/services_shell.py
+++ b/zunclient/v1/services_shell.py
@@ -61,3 +61,17 @@ def do_service_disable(cs, args):
     """Disable the Zun service."""
     res = cs.services.disable(args.host, args.binary, args.reason)
     utils.print_dict(res[1]['service'])
+
+
+@utils.arg('host', metavar='<hostname>', help='Name of host.')
+@utils.arg('binary', metavar='<binary>', help='Service binary.')
+@utils.arg(
+    '--unset',
+    dest='force_down',
+    help="Unset the force state down of service.",
+    action='store_false',
+    default=True)
+def do_service_force_down(cs, args):
+    """Force Zun service to down or unset the force state."""
+    res = cs.services.force_down(args.host, args.binary, args.force_down)
+    utils.print_dict(res[1]['service'])