diff --git a/airflow/providers/docker/operators/docker.py b/airflow/providers/docker/operators/docker.py
index b02801a..f8a8923 100644
--- a/airflow/providers/docker/operators/docker.py
+++ b/airflow/providers/docker/operators/docker.py
@@ -65,6 +65,9 @@
     :type docker_url: str
     :param environment: Environment variables to set in the container. (templated)
     :type environment: dict
+    :param private_environment: Private environment variables to set in the container.
+        These are not templated, and hidden from the website.
+    :type private_environment: dict
     :param force_pull: Pull the docker image on every run. Default is False.
     :type force_pull: bool
     :param mem_limit: Maximum amount of memory the container can use.
@@ -136,6 +139,7 @@
             cpus: float = 1.0,
             docker_url: str = 'unix://var/run/docker.sock',
             environment: Optional[Dict] = None,
+            private_environment: Optional[Dict] = None,
             force_pull: bool = False,
             mem_limit: Optional[Union[float, str]] = None,
             host_tmp_dir: Optional[str] = None,
@@ -169,6 +173,7 @@
         self.dns_search = dns_search
         self.docker_url = docker_url
         self.environment = environment or {}
+        self._private_environment = private_environment or {}
         self.force_pull = force_pull
         self.image = image
         self.mem_limit = mem_limit
@@ -218,7 +223,7 @@
             self.container = self.cli.create_container(
                 command=self.get_command(),
                 name=self.container_name,
-                environment=self.environment,
+                environment={**self.environment, **self._private_environment},
                 host_config=self.cli.create_host_config(
                     auto_remove=self.auto_remove,
                     binds=self.volumes,
diff --git a/tests/providers/docker/operators/test_docker.py b/tests/providers/docker/operators/test_docker.py
index 068eaef..44aad34 100644
--- a/tests/providers/docker/operators/test_docker.py
+++ b/tests/providers/docker/operators/test_docker.py
@@ -50,8 +50,9 @@
         client_class_mock.return_value = client_mock
 
         operator = DockerOperator(api_version='1.19', command='env', environment={'UNIT': 'TEST'},
-                                  image='ubuntu:latest', network_mode='bridge', owner='unittest',
-                                  task_id='unittest', volumes=['/host/path:/container/path'],
+                                  private_environment={'PRIVATE': 'MESSAGE'}, image='ubuntu:latest',
+                                  network_mode='bridge', owner='unittest', task_id='unittest',
+                                  volumes=['/host/path:/container/path'],
                                   working_dir='/container/path', shm_size=1000,
                                   host_tmp_dir='/host/airflow', container_name='test_container',
                                   tty=True)
@@ -64,7 +65,8 @@
                                                              name='test_container',
                                                              environment={
                                                                  'AIRFLOW_TMP_DIR': '/tmp/airflow',
-                                                                 'UNIT': 'TEST'
+                                                                 'UNIT': 'TEST',
+                                                                 'PRIVATE': 'MESSAGE'
                                                              },
                                                              host_config=host_config,
                                                              image='ubuntu:latest',
@@ -89,6 +91,15 @@
                                                  decode=True)
         client_mock.wait.assert_called_once_with('some_id')
 
+    def test_private_environment_is_private(self):
+        operator = DockerOperator(private_environment={'PRIVATE': 'MESSAGE'},
+                                  image='ubuntu:latest',
+                                  task_id='unittest')
+        self.assertEqual(
+            operator._private_environment, {'PRIVATE': 'MESSAGE'},
+            "To keep this private, it must be an underscored attribute."
+        )
+
     @mock.patch('airflow.providers.docker.operators.docker.tls.TLSConfig')
     @mock.patch('airflow.providers.docker.operators.docker.APIClient')
     def test_execute_tls(self, client_class_mock, tls_class_mock):
@@ -259,6 +270,7 @@
             'api_version': '1.19',
             'command': 'env',
             'environment': {'UNIT': 'TEST'},
+            'private_environment': {'PRIVATE': 'MESSAGE'},
             'image': 'ubuntu:latest',
             'network_mode': 'bridge',
             'owner': 'unittest',