diff --git a/ISCamRecorder/MainForm.cs b/ISCamRecorder/MainForm.cs
index 01742ee..8be9069 100644
--- a/ISCamRecorder/MainForm.cs
+++ b/ISCamRecorder/MainForm.cs
@@ -134,7 +134,11 @@
         /// OpenCVカメラスレッド
         /// </summary>
         private void CvCameraThread() {
-            if (!_CvCamera.Open(CVCAMERA_ID, CVCAMERA_WIDTH, CVCAMERA_HEIGHT)) return;
+            if (!_CvCamera.Open(CVCAMERA_ID, CVCAMERA_WIDTH, CVCAMERA_HEIGHT)) {
+                Setting.RecCameras[4] = false;
+                Setting.SnapCameras[4] = false;
+                return;
+            }
             _CvCamera.CameraLoop();
         }