diff --git a/libcloud/compute/drivers/azure_arm.py b/libcloud/compute/drivers/azure_arm.py
index 9c540fec73..9a5c96430b 100644
--- a/libcloud/compute/drivers/azure_arm.py
+++ b/libcloud/compute/drivers/azure_arm.py
@@ -2184,6 +2184,24 @@ def ex_stop_node(self, node, deallocate=True):
         # Libcloud v2.7.0
         return self.stop_node(node=node, ex_deallocate=deallocate)
 
+    def ex_resize_node(self, node, size):
+        """
+        Resize the node to a different machine size.
+
+        :param node: Node to resize
+        :type node: :class:`Node`
+
+        :param size: New size for this machine
+        :type node: :class:`NodeSize`
+        """
+        target = "%s/resize" % node.id
+        data = {"size": size.id}
+        r = self.connection.request(
+            target, params={"api-version": VM_API_VERSION}, data=data,
+            method="POST"
+        )
+        return r.object
+
     def ex_get_storage_account_keys(self, resource_group, storage_account):
         """
         Get account keys required to access to a storage account
diff --git a/libcloud/test/compute/fixtures/azure_arm/_subscriptions_99999999_resourceGroups_000000_providers_Microsoft_Compute_virtualMachines_test_node_1_resize.json b/libcloud/test/compute/fixtures/azure_arm/_subscriptions_99999999_resourceGroups_000000_providers_Microsoft_Compute_virtualMachines_test_node_1_resize.json
new file mode 100644
index 0000000000..9cbc7c1d6c
--- /dev/null
+++ b/libcloud/test/compute/fixtures/azure_arm/_subscriptions_99999999_resourceGroups_000000_providers_Microsoft_Compute_virtualMachines_test_node_1_resize.json
@@ -0,0 +1,51 @@
+{
+  "properties": {
+    "vmId": "99999999-9999-9999-9999-999999999999",
+    "hardwareProfile": {
+      "vmSize": "Standard_A1"
+    },
+    "storageProfile": {
+      "osDisk": {
+        "osType": "Linux",
+        "name": "OSD-9999",
+        "createOption": "Attach",
+        "caching": "ReadWrite",
+        "managedDisk": {
+          "storageAccountType": "Standard_LRS",
+          "id": "/subscriptions/99999999-9999-9999-9999-999999999999/resourceGroups/000000/providers/Microsoft.Compute/disks/OSD-9999"
+        }
+      },
+      "dataDisks": [
+        {
+          "lun": 0,
+          "name": "DD0-9999",
+          "createOption": "Attach",
+          "caching": "None",
+          "managedDisk": {
+            "storageAccountType": "Standard_LRS",
+            "id": "/subscriptions/99999999-9999-9999-9999-999999999999/resourceGroups/000000/providers/Microsoft.Compute/disks/DD0-9999"
+          },
+          "diskSizeGB": 8
+        }
+      ]
+    },
+    "networkProfile": {
+      "networkInterfaces": [
+        {
+          "id": "/subscriptions/99999999-9999-9999-9999-999999999999/resourceGroups/0000/providers/Microsoft.Network/networkInterfaces/test-nic",
+          "properties": {
+            "primary": true
+          }
+        }
+      ]
+    },
+    "provisioningState": "Succeeded"
+  },
+  "type": "Microsoft.Compute/virtualMachines",
+  "location": "eastus",
+  "tags": {
+    "tag_key1": "tag_val1"
+  },
+  "id": "/subscriptions/99999999-9999-9999-9999-999999999999/resourceGroups/0000/providers/Microsoft.Compute/virtualMachines/test_vm",
+  "name": "test_vm"
+}
diff --git a/libcloud/test/compute/test_azure_arm.py b/libcloud/test/compute/test_azure_arm.py
index 038850c466..90d532900e 100644
--- a/libcloud/test/compute/test_azure_arm.py
+++ b/libcloud/test/compute/test_azure_arm.py
@@ -673,6 +673,15 @@ def test_resize_volume(self):
 
         self.assertEqual(new_size, original_size + 8)
 
+    def test_resize_node(self):
+        location = self.driver.list_locations()[0]
+        size = self.driver.list_sizes(location=location)[0]
+        node = self.driver.list_nodes()[0]
+
+        value = self.driver.ex_resize_node(node, size)
+
+        self.assertEqual(value["size"], size.id)
+
     def test_detach_volume(self):
         volumes = self.driver.list_volumes()
         node = self.driver.list_nodes()[0]