diff --git a/.github/workflows/e2e-test.yml b/.github/workflows/e2e-test.yml
index c5bac62d..56ad11e3 100644
--- a/.github/workflows/e2e-test.yml
+++ b/.github/workflows/e2e-test.yml
@@ -24,6 +24,12 @@ jobs:
       - run: |
           sudo apt-get update
           sudo apt-get -y install libva-dev libdrm-dev
+      - name: Download openh264
+        run: |
+          curl -LO http://ciscobinary.openh264.org/libopenh264-2.4.1-linux64.7.so.bz2
+          bzip2 -d libopenh264-2.4.1-linux64.7.so.bz2
+          mv libopenh264-2.4.1-linux64.7.so libopenh264.so
+        working-directory: ./test-e2e
       - run: rye pin ${{ matrix.python_version }}
       - run: rye sync
       - run: rye run python run.py
diff --git a/.gitignore b/.gitignore
index 74a8db26..f07e06e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,4 +20,5 @@ src/sora_sdk/model_coeffs/*
 /wheelhouse
 
 # E2E テスト用
-.env
\ No newline at end of file
+.env
+libopenh264.so
\ No newline at end of file
diff --git a/requirements-dev.lock b/requirements-dev.lock
index e2e131b1..5a107b60 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -28,5 +28,5 @@ pyproject-hooks==1.0.0
 pytest==8.0.0
 python-dotenv==1.0.1
 ruff==0.1.14
-setuptools==69.0.3
 wheel==0.42.0
+setuptools==69.0.3
diff --git a/tests/README.md b/tests/README.md
index d1740e36..ba911dde 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -6,8 +6,9 @@
 
 ```bash
 TEST_SIGNALING_URL=wss://sora.example.com/signaling
-TEST_CHANNEL_ID_PREFIX=sora_
+TEST_CHANNEL_ID_PREFIX=sora
 TEST_SECRET_KEY=secret
+TEST_OPENH264_PATH=/usr/local/lib/libopenh264.so
 ```
 
 ## 実行方法
diff --git a/tests/conftest.py b/tests/conftest.py
index 2fb22c0e..64b62d1c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -13,4 +13,5 @@ def setup():
         "channel_id_prefix": os.environ.get("TEST_CHANNEL_ID_PREFIX"),
         "secret": os.environ.get("TEST_SECRET_KEY"),
         "metadata": {"access_token": os.environ.get("TEST_SECRET_KEY")},
+        "openh264_path": os.environ.get("TEST_OPENH264_PATH"),
     }
diff --git a/tests/test_openh264.py b/tests/test_openh264.py
new file mode 100644
index 00000000..9977b11e
--- /dev/null
+++ b/tests/test_openh264.py
@@ -0,0 +1,111 @@
+import json
+import threading
+import time
+from threading import Event
+
+import numpy as np
+from sora_sdk import Sora, SoraConnection, SoraVideoSource
+
+
+class Sendonly:
+    _sora: Sora = None
+    _connection: SoraConnection
+
+    _connection_id: str
+
+    # 接続した
+    _connected: Event = Event()
+    # 終了
+    _closed: bool = False
+
+    _video_height: int = 480
+    _video_width: int = 640
+    _video_input_thread: threading.Thread
+    _video_source: SoraVideoSource
+
+    def __init__(self, openh264_path: str, signaling_urls: list, channel_id: str, metadata: dict):
+        print(channel_id)
+        self._sora = Sora(openh264=openh264_path)
+        self._connected = Event()
+
+        self._video_source = self._sora.create_video_source()
+
+        self._connection = self._sora.create_connection(
+            signaling_urls=signaling_urls,
+            role="sendonly",
+            channel_id=channel_id,
+            metadata=metadata,
+            audio=False,
+            video=True,
+            video_codec_type="H264",
+            video_source=self._video_source,
+        )
+
+        self._connection.on_set_offer = self._on_set_offer
+        self._connection.on_notify = self._on_notify
+        self._connection.on_disconnect = self._on_disconnect
+
+    def connect(self):
+        self._connection.connect()
+
+        self._video_input_thread = threading.Thread(target=self._video_input_loop, daemon=True)
+        self._video_input_thread.start()
+
+        # _connected が set されるまで 30 秒待つ
+        assert self._connected.wait(30)
+
+        return self
+
+    def _video_input_loop(self):
+        while not self._closed:
+            time.sleep(1.0 / 30)
+            self._video_source.on_captured(
+                np.zeros((self._video_height, self._video_width, 3), dtype=np.uint8)
+            )
+
+    def _on_set_offer(self, raw_offer):
+        offer = json.loads(raw_offer)
+        if offer["type"] == "offer":
+            self.connection_id = offer["connection_id"]
+            print(f"Offer を受信しました: connection_id={self.connection_id}")
+
+    def _on_notify(self, raw_message):
+        message = json.loads(raw_message)
+        if (
+            message["type"] == "notify"
+            and message["event_type"] == "connection.created"
+            and message["connection_id"] == self.connection_id
+        ):
+            print(f"Sora に接続しました: connection_id={self.connection_id}")
+            self._connected.set()
+
+    def _on_disconnect(self, error_code, message):
+        print(f"Sora から切断しました: error_code='{error_code}' message='{message}'")
+        self._closed = True
+        self._connected.clear()
+
+    def disconnect(self):
+        self._connection.disconnect()
+        # タイムアウト指定
+        self._video_input_thread.join(timeout=10)
+
+
+def test_sendonly(setup):
+    signaling_urls = setup.get("signaling_urls")
+    channel_id_prefix = setup.get("channel_id_prefix")
+    metadata = setup.get("metadata")
+    openh264_path = setup.get("openh264_path")
+
+    channel_id = f"{channel_id_prefix}_{__name__}"
+
+    sendonly = Sendonly(
+        openh264_path,
+        signaling_urls,
+        channel_id,
+        metadata,
+    )
+    sendonly.connect()
+
+    time.sleep(5)
+
+    sendonly.disconnect()