diff --git a/changelogs/fragments/4387-nmcli-mtu-for-vlan-connection-fix.yml b/changelogs/fragments/4387-nmcli-mtu-for-vlan-connection-fix.yml
new file mode 100644
index 00000000000..e867135b2ac
--- /dev/null
+++ b/changelogs/fragments/4387-nmcli-mtu-for-vlan-connection-fix.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - nmcli - implemented changing mtu value on vlan interfaces (https://github.com/ansible-collections/community.general/issues/4387).
diff --git a/plugins/modules/net_tools/nmcli.py b/plugins/modules/net_tools/nmcli.py
index 71d0c492dd5..afb476ae062 100644
--- a/plugins/modules/net_tools/nmcli.py
+++ b/plugins/modules/net_tools/nmcli.py
@@ -1765,6 +1765,7 @@ def mtu_conn_type(self):
             'dummy',
             'ethernet',
             'team-slave',
+            'vlan',
         )
 
     @property
diff --git a/tests/unit/plugins/modules/net_tools/test_nmcli.py b/tests/unit/plugins/modules/net_tools/test_nmcli.py
index 885bdf3a967..eabdb9e5c0a 100644
--- a/tests/unit/plugins/modules/net_tools/test_nmcli.py
+++ b/tests/unit/plugins/modules/net_tools/test_nmcli.py
@@ -663,6 +663,7 @@
 ipv6.ignore-auto-dns:                   no
 ipv6.ignore-auto-routes:                no
 vlan.id:                                10
+802-3-ethernet.mtu:                     auto
 """
 
 TESTCASE_VXLAN = [