diff --git a/maxapi/bot.py b/maxapi/bot.py
index a434982..0828d7c 100644
--- a/maxapi/bot.py
+++ b/maxapi/bot.py
@@ -410,7 +410,7 @@ async def send_message(
     async def send_action(
         self,
         chat_id: int | None = None,
-        action: SenderAction = SenderAction.TYPING_ON,
+        action: SenderAction | str = SenderAction.TYPING_ON,
     ) -> SendedAction:
         """
         Отправляет действие в чат (например, "печатает").
@@ -419,12 +419,11 @@ async def send_action(
 
         Args:
             chat_id (Optional[int]): ID чата.
-            action (SenderAction): Тип действия.
+            action (SenderAction | str): Тип действия.
 
         Returns:
             SendedAction: Результат отправки действия.
         """
-
         return await SendAction(
             bot=self, chat_id=chat_id, action=action
         ).fetch()
diff --git a/maxapi/methods/send_action.py b/maxapi/methods/send_action.py
index 54ed424..af8c748 100644
--- a/maxapi/methods/send_action.py
+++ b/maxapi/methods/send_action.py
@@ -21,7 +21,7 @@ class SendAction(BaseConnection):
         bot (Bot): Экземпляр бота для выполнения запроса.
         chat_id (Optional[int]): Идентификатор чата. Если None,
             действие не отправляется.
-        action (Optional[SenderAction]): Тип действия. По умолчанию
+        action (SenderAction | str): Тип действия. По умолчанию
             SenderAction.TYPING_ON.
     """
 
@@ -29,9 +29,25 @@ def __init__(
         self,
         bot: "Bot",
         chat_id: int | None = None,
-        action: SenderAction = SenderAction.TYPING_ON,
+        action: SenderAction | str = SenderAction.TYPING_ON,
     ):
         super().__init__()
+
+        if not isinstance(action, SenderAction):
+            if not isinstance(action, str):
+                raise TypeError(
+                    f"action должен быть SenderAction или str, "
+                    f"получено: {type(action).__name__}"
+                )
+
+            try:
+                action = SenderAction(action)
+            except ValueError as e:
+                allowed = ", ".join(item.value for item in SenderAction)
+                raise ValueError(
+                    f"Неверный action: {action!r}. Ожидается: {allowed}"
+                ) from e
+
         self.bot = bot
         self.chat_id = chat_id
         self.action = action
diff --git a/tests/test_bot.py b/tests/test_bot.py
index 661f8a6..b388792 100644
--- a/tests/test_bot.py
+++ b/tests/test_bot.py
@@ -185,6 +185,78 @@ async def test_send_action_call(self, bot):
 
             assert mock_fetch.called
 
+    @pytest.mark.asyncio
+    async def test_send_invalid_action_as_string(self, bot):
+        """Тест вызова send_action с неверными данными."""
+        # Core Stuff
+        from maxapi.methods.send_action import SendAction
+
+        available_actions = ", ".join(action.value for action in SenderAction)
+
+        with patch.object(
+            SendAction, "fetch", new_callable=AsyncMock
+        ) as mock_fetch:
+            mock_fetch.return_value = Mock()
+
+            with pytest.raises(ValueError) as exc_info:  # noqa: PT011
+                await bot.send_action(chat_id=12345, action="fake_action")
+
+            exc_message = str(exc_info.value)
+
+            assert "Неверный" in exc_message
+            assert available_actions in exc_message
+
+    @pytest.mark.asyncio
+    async def test_send_valid_action_as_string(self, bot):
+        """Тест вызова send_action с верными данными."""
+        # Core Stuff
+        from maxapi.methods.send_action import SendAction
+
+        with patch.object(
+            SendAction, "fetch", new_callable=AsyncMock
+        ) as mock_fetch:
+            mock_fetch.return_value = Mock()
+
+            await bot.send_action(chat_id=12345, action="typing_on")
+
+            assert mock_fetch.called
+
+    @pytest.mark.asyncio
+    async def test_send_action_without_action_param(self, bot):
+        """Тест вызова send_action без передачи action."""
+        # Core Stuff
+        from maxapi.methods.send_action import SendAction
+
+        with patch.object(
+            SendAction, "fetch", new_callable=AsyncMock
+        ) as mock_fetch:
+            mock_fetch.return_value = Mock()
+
+            await bot.send_action(chat_id=12345)
+
+            assert mock_fetch.called
+
+    @pytest.mark.asyncio
+    async def test_send_action_with_wrong_action_type(self, bot):
+        """Тест вызова send_action с передачей неверного типа (не SenderAction, не str)."""  # noqa: E501
+        # Core Stuff
+        from maxapi.methods.send_action import SendAction
+
+        with patch.object(
+            SendAction, "fetch", new_callable=AsyncMock
+        ) as mock_fetch:
+            mock_fetch.return_value = Mock()
+
+            wrong_action = 123
+            wrong_action_type = type(wrong_action).__name__
+
+            with pytest.raises(TypeError) as exc_info:
+                await bot.send_action(chat_id=12345, action=wrong_action)
+
+            exc_message = str(exc_info.value)
+
+            assert wrong_action_type in exc_message
+
     @pytest.mark.asyncio
     async def test_get_me_structure(self, bot):
         """Тест структуры вызова get_me."""