diff --git a/slack_sdk/socket_mode/aiohttp/__init__.py b/slack_sdk/socket_mode/aiohttp/__init__.py
index 69e39dfa..ce6446a1 100644
--- a/slack_sdk/socket_mode/aiohttp/__init__.py
+++ b/slack_sdk/socket_mode/aiohttp/__init__.py
@@ -95,6 +95,7 @@ def __init__(
             on_message_listeners: listener functions for on_message
             on_error_listeners: listener functions for on_error
             on_close_listeners: listener functions for on_close
+            loop: an existing asyncio event loop
         """
         self.app_token = app_token
         self.logger = logger or logging.getLogger(__name__)
diff --git a/tests/slack_sdk_async/socket_mode/test_aiohttp.py b/tests/slack_sdk_async/socket_mode/test_aiohttp.py
index 797c51c3..44bb2d9d 100644
--- a/tests/slack_sdk_async/socket_mode/test_aiohttp.py
+++ b/tests/slack_sdk_async/socket_mode/test_aiohttp.py
@@ -1,3 +1,4 @@
+import asyncio
 import unittest
 
 from slack_sdk.socket_mode.aiohttp import SocketModeClient
@@ -30,6 +31,19 @@ async def test_init_close(self):
         finally:
             await client.close()
 
+    @async_test
+    async def test_init_with_loop(self):
+        client = SocketModeClient(
+            app_token="xapp-A111-222-xyz",
+            web_client=self.web_client,
+            auto_reconnect_enabled=False,
+            loop=asyncio.new_event_loop(),
+        )
+        try:
+            self.assertIsNotNone(client)
+        finally:
+            await client.close()
+
     @async_test
     async def test_issue_new_wss_url(self):
         client = SocketModeClient(