diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46a968fde..16c6075d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- Added `endpoint_id` parameter to `AzureSTTService`. ([Custom EndpointId](https://docs.azure.cn/en-us/ai-services/speech-service/how-to-recognize-speech?pivots=programming-language-python#use-a-custom-endpoint))
+
 ### Changed
 
 - Updated `pyproject.toml` to once again pin `numba` to `>=0.61.2` in order to
diff --git a/src/pipecat/services/azure/stt.py b/src/pipecat/services/azure/stt.py
index 6965ba188..cd49c98d8 100644
--- a/src/pipecat/services/azure/stt.py
+++ b/src/pipecat/services/azure/stt.py
@@ -60,6 +60,7 @@ class AzureSTTService(STTService):
         region: str,
         language: Language = Language.EN_US,
         sample_rate: Optional[int] = None,
+        endpoint_id: Optional[str] = None,
         **kwargs,
     ):
         """Initialize the Azure STT service.
@@ -69,6 +70,7 @@ class AzureSTTService(STTService):
             region: Azure region for the Speech service (e.g., 'eastus').
             language: Language for speech recognition. Defaults to English (US).
             sample_rate: Audio sample rate in Hz. If None, uses service default.
+            endpoint_id: Custom model endpoint id.
             **kwargs: Additional arguments passed to parent STTService.
         """
         super().__init__(sample_rate=sample_rate, **kwargs)
@@ -79,6 +81,9 @@ class AzureSTTService(STTService):
             speech_recognition_language=language_to_azure_language(language),
         )
 
+        if endpoint_id:
+            self._speech_config.endpoint_id = endpoint_id
+
         self._audio_stream = None
         self._speech_recognizer = None
         self._settings = {