diff --git a/releasenotes/notes/routers-client-as-library-25a363379da351f6.yaml b/releasenotes/notes/routers-client-as-library-25a363379da351f6.yaml
new file mode 100644
index 0000000..35cf2c4
--- /dev/null
+++ b/releasenotes/notes/routers-client-as-library-25a363379da351f6.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - Define routers_client as stable library interface.
+    The routers_client module is defined as library interface,
+    so the other projects can use the module as stable library
+    without any maintenance changes.
diff --git a/tempest/clients.py b/tempest/clients.py
index 19f1a2a..bc56710 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -88,6 +88,7 @@
 from tempest.lib.services.network.ports_client import PortsClient
 from tempest.lib.services.network.quotas_client import QuotasClient \
     as NetworkQuotasClient
+from tempest.lib.services.network.routers_client import RoutersClient
 from tempest.lib.services.network.security_group_rules_client import \
     SecurityGroupRulesClient
 from tempest.lib.services.network.security_groups_client import \
@@ -133,7 +134,6 @@
 from tempest.services.image.v1.json.images_client import ImagesClient
 from tempest.services.image.v2.json.images_client import \
     ImagesClient as ImagesV2Client
-from tempest.services.network.json.routers_client import RoutersClient
 from tempest.services.object_storage.account_client import AccountClient
 from tempest.services.object_storage.container_client import ContainerClient
 from tempest.services.object_storage.object_client import ObjectClient
diff --git a/tempest/cmd/account_generator.py b/tempest/cmd/account_generator.py
index 5fab961..94a646a 100755
--- a/tempest/cmd/account_generator.py
+++ b/tempest/cmd/account_generator.py
@@ -98,12 +98,12 @@
 from tempest.lib.common.utils import data_utils
 import tempest.lib.exceptions
 from tempest.lib.services.network import networks_client
+from tempest.lib.services.network import routers_client
 from tempest.lib.services.network import subnets_client
 from tempest.services.identity.v2.json import identity_client
 from tempest.services.identity.v2.json import roles_client
 from tempest.services.identity.v2.json import tenants_client
 from tempest.services.identity.v2.json import users_client
-from tempest.services.network.json import routers_client
 
 LOG = None
 CONF = config.CONF
diff --git a/tempest/cmd/javelin.py b/tempest/cmd/javelin.py
index f2a69c7..6a65fcb 100755
--- a/tempest/cmd/javelin.py
+++ b/tempest/cmd/javelin.py
@@ -128,13 +128,13 @@
 from tempest.lib.services.compute import servers_client
 from tempest.lib.services.network import networks_client
 from tempest.lib.services.network import ports_client
+from tempest.lib.services.network import routers_client
 from tempest.lib.services.network import subnets_client
 from tempest.services.identity.v2.json import identity_client
 from tempest.services.identity.v2.json import roles_client
 from tempest.services.identity.v2.json import tenants_client
 from tempest.services.identity.v2.json import users_client
 from tempest.services.image.v2.json import images_client
-from tempest.services.network.json import routers_client
 from tempest.services.object_storage import container_client
 from tempest.services.object_storage import object_client
 from tempest.services.volume.v1.json import volumes_client
diff --git a/tempest/hacking/ignored_list_T110.txt b/tempest/hacking/ignored_list_T110.txt
index 4ef9012..be875ee 100644
--- a/tempest/hacking/ignored_list_T110.txt
+++ b/tempest/hacking/ignored_list_T110.txt
@@ -2,4 +2,3 @@
 ./tempest/services/volume/base/base_qos_client.py
 ./tempest/services/volume/base/base_backups_client.py
 ./tempest/services/baremetal/base.py
-./tempest/services/network/json/routers_client.py
diff --git a/tempest/services/network/json/routers_client.py b/tempest/lib/services/network/routers_client.py
similarity index 100%
rename from tempest/services/network/json/routers_client.py
rename to tempest/lib/services/network/routers_client.py
diff --git a/tempest/services/network/json/__init__.py b/tempest/services/network/json/__init__.py
deleted file mode 100644
index e69de29..0000000
--- a/tempest/services/network/json/__init__.py
+++ /dev/null
diff --git a/tempest/tests/common/test_dynamic_creds.py b/tempest/tests/common/test_dynamic_creds.py
index f025418..a7a3a22 100644
--- a/tempest/tests/common/test_dynamic_creds.py
+++ b/tempest/tests/common/test_dynamic_creds.py
@@ -23,6 +23,7 @@
 from tempest.lib.common import rest_client
 from tempest.lib.services.identity.v2 import token_client as v2_token_client
 from tempest.lib.services.identity.v3 import token_client as v3_token_client
+from tempest.lib.services.network import routers_client
 from tempest.services.identity.v2.json import identity_client as v2_iden_client
 from tempest.services.identity.v2.json import roles_client as v2_roles_client
 from tempest.services.identity.v2.json import tenants_client as \
@@ -34,7 +35,6 @@
     v3_projects_client
 from tempest.services.identity.v3.json import roles_client as v3_roles_client
 from tempest.services.identity.v3.json import users_clients as v3_users_client
-from tempest.services.network.json import routers_client
 from tempest.tests import base
 from tempest.tests import fake_config
 from tempest.tests.lib import fake_http
@@ -333,7 +333,7 @@
         self._mock_subnet_create(creds, '1234', 'fake_subnet')
         self._mock_router_create('1234', 'fake_router')
         router_interface_mock = self.patch(
-            'tempest.services.network.json.routers_client.RoutersClient.'
+            'tempest.lib.services.network.routers_client.RoutersClient.'
             'add_router_interface')
         primary_creds = creds.get_primary_creds()
         router_interface_mock.assert_called_once_with('1234', subnet_id='1234')
@@ -365,7 +365,7 @@
         self._mock_subnet_create(creds, '1234', 'fake_subnet')
         self._mock_router_create('1234', 'fake_router')
         router_interface_mock = self.patch(
-            'tempest.services.network.json.routers_client.RoutersClient.'
+            'tempest.lib.services.network.routers_client.RoutersClient.'
             'add_router_interface')
         creds.get_primary_creds()
         router_interface_mock.assert_called_once_with('1234', subnet_id='1234')
@@ -397,7 +397,7 @@
         router = mock.patch.object(creds.routers_admin_client, 'delete_router')
         router_mock = router.start()
         remove_router_interface_mock = self.patch(
-            'tempest.services.network.json.routers_client.RoutersClient.'
+            'tempest.lib.services.network.routers_client.RoutersClient.'
             'remove_router_interface')
         return_values = ({'status': 200}, {'ports': []})
         port_list_mock = mock.patch.object(creds.ports_admin_client,
@@ -468,7 +468,7 @@
         self._mock_subnet_create(creds, '1234', 'fake_alt_subnet')
         self._mock_router_create('1234', 'fake_alt_router')
         router_interface_mock = self.patch(
-            'tempest.services.network.json.routers_client.RoutersClient.'
+            'tempest.lib.services.network.routers_client.RoutersClient.'
             'add_router_interface')
         alt_creds = creds.get_alt_creds()
         router_interface_mock.assert_called_once_with('1234', subnet_id='1234')
@@ -492,7 +492,7 @@
         self._mock_subnet_create(creds, '1234', 'fake_admin_subnet')
         self._mock_router_create('1234', 'fake_admin_router')
         router_interface_mock = self.patch(
-            'tempest.services.network.json.routers_client.RoutersClient.'
+            'tempest.lib.services.network.routers_client.RoutersClient.'
             'add_router_interface')
         self._mock_list_roles('123456', 'admin')
         admin_creds = creds.get_admin_creds()
diff --git a/tempest/services/network/__init__.py b/tempest/tests/lib/services/network/__init__.py
similarity index 100%
rename from tempest/services/network/__init__.py
rename to tempest/tests/lib/services/network/__init__.py
diff --git a/tempest/tests/lib/services/network/test_routers_client.py b/tempest/tests/lib/services/network/test_routers_client.py
new file mode 100644
index 0000000..2fa5993
--- /dev/null
+++ b/tempest/tests/lib/services/network/test_routers_client.py
@@ -0,0 +1,109 @@
+# Copyright 2016 NEC Corporation.  All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.lib.services.network import routers_client
+from tempest.tests.lib import fake_auth_provider
+from tempest.tests.lib.services import base
+
+
+class TestRoutersClient(base.BaseServiceTest):
+    FAKE_CREATE_ROUTER = {
+        "router": {
+            "name": u'\u2740(*\xb4\u25e1`*)\u2740',
+            "external_gateway_info": {
+                "network_id": "8ca37218-28ff-41cb-9b10-039601ea7e6b",
+                "enable_snat": True,
+                "external_fixed_ips": [
+                    {
+                        "subnet_id": "255.255.255.0",
+                        "ip": "192.168.10.1"
+                    }
+                ]
+            },
+            "admin_state_up": True,
+            "id": "8604a0de-7f6b-409a-a47c-a1cc7bc77b2e"
+        }
+    }
+
+    FAKE_UPDATE_ROUTER = {
+        "router": {
+            "name": u'\u2740(*\xb4\u25e1`*)\u2740',
+            "external_gateway_info": {
+                "network_id": "8ca37218-28ff-41cb-9b10-039601ea7e6b",
+                "enable_snat": True,
+                "external_fixed_ips": [
+                    {
+                        "subnet_id": "255.255.255.0",
+                        "ip": "192.168.10.1"
+                    }
+                ]
+            },
+            "admin_state_up": False,
+            "id": "8604a0de-7f6b-409a-a47c-a1cc7bc77b2e"
+        }
+    }
+
+    def setUp(self):
+        super(TestRoutersClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = routers_client.RoutersClient(fake_auth,
+                                                   'network', 'regionOne')
+
+    def _test_list_routers(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_routers,
+            'tempest.lib.common.rest_client.RestClient.get',
+            {"routers": []},
+            bytes_body)
+
+    def _test_create_router(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_router,
+            'tempest.lib.common.rest_client.RestClient.post',
+            self.FAKE_CREATE_ROUTER,
+            bytes_body,
+            name="another_router", admin_state_up="true", status=201)
+
+    def _test_update_router(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.update_router,
+            'tempest.lib.common.rest_client.RestClient.put',
+            self.FAKE_UPDATE_ROUTER,
+            bytes_body,
+            router_id="8604a0de-7f6b-409a-a47c-a1cc7bc77b2e",
+            admin_state_up=False)
+
+    def test_list_routers_with_str_body(self):
+        self._test_list_routers()
+
+    def test_list_routers_with_bytes_body(self):
+        self._test_list_routers(bytes_body=True)
+
+    def test_create_router_with_str_body(self):
+        self._test_create_router()
+
+    def test_create_router_with_bytes_body(self):
+        self._test_create_router(bytes_body=True)
+
+    def test_delete_router(self):
+        self.check_service_client_function(
+            self.client.delete_router,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {}, router_id="1", status=204)
+
+    def test_update_router_with_str_body(self):
+        self._test_update_router()
+
+    def test_update_router_with_bytes_body(self):
+        self._test_update_router(bytes_body=True)