diff --git a/ECTrainer2/BitalMonitor.cpp b/ECTrainer2/BitalMonitor.cpp
index 071ce24..5daedb6 100644
--- a/ECTrainer2/BitalMonitor.cpp
+++ b/ECTrainer2/BitalMonitor.cpp
@@ -14,19 +14,12 @@
 	_rrInterval.Put(0);
 }
 
+
 // 初期化
 bool BitalMonitor::Init() {
-
-	// デバイスの探索
-	for (int com = 1; com <= COM_SEARCH_MAX; com++) {
-
-		if (!_Com.Open(com, _T("baud=19200 parity=N data=8 stop=1"))) continue;
-
-		// ポートチェック
-		char comBuf[BUF_LEN] = { '\0' };
-		DWORD readBytes = _Com.Receive((BYTE*)comBuf, BUF_LEN - 1);
-		if (readBytes < 1) continue;
-		if ((*comBuf >= '0' && *comBuf <= '9') || *comBuf == '#' || *comBuf == LF) {
+	int com = nkc::ComPort::FindDevice(_T("CP210x"));
+	if (com > 0) {
+		if (_Com.Open(com, _T("baud=19200 parity=N data=8 stop=1"))) {
 			Ect()->PWorker()->EventLog(_T("Bital device connected."));
 			_useDevice = true;
 			return true;
diff --git a/ECTrainer2/BitalMonitor.h b/ECTrainer2/BitalMonitor.h
index 01d662e..44e61b6 100644
--- a/ECTrainer2/BitalMonitor.h
+++ b/ECTrainer2/BitalMonitor.h
@@ -23,7 +23,6 @@
 	// ECTrainerインスタンス取得
 	ECTrainer* Ect() { return (ECTrainer*)_pUserdata; }
 
-
 public:
 	BitalMonitor(ECTrainer* pEct);
 	bool Init();
diff --git a/ECTrainer2/ComPort.cpp b/ECTrainer2/ComPort.cpp
index 1e03c20..de10187 100644
--- a/ECTrainer2/ComPort.cpp
+++ b/ECTrainer2/ComPort.cpp
@@ -1,4 +1,8 @@
 #include "ComPort.h"
+#include <setupapi.h>
+#include <string>
+#pragma comment(lib,"setupapi.lib")
+typedef std::basic_string<TCHAR> tstring;
 
 namespace nkc {
 
@@ -129,4 +133,40 @@
 	return receiveSize;
 }
 
+
+// COMポートデバイスを検索する
+// 引数 TCHAR* deviceStr : 検索するデバイス名（部分一致）
+// 戻り値 (int)COMポート番号，未発見時は 0
+int ComPort::FindDevice(const TCHAR* deviceStr) {
+
+	HDEVINFO hDevInfo = SetupDiGetClassDevs(&GUID_DEVINTERFACE_COMPORT, 0, 0,
+		DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); // デバイス情報セットを取得
+	if (!hDevInfo) return 0; // デバイス情報セットが取得できなかった場合
+
+	SP_DEVINFO_DATA devInfoData;
+	ZeroMemory(&devInfoData, sizeof(devInfoData));
+	devInfoData.cbSize = sizeof(devInfoData);
+
+	// COMポート列挙
+	int nDevice = 0;
+	int com = 0;
+	while (SetupDiEnumDeviceInfo(hDevInfo, nDevice++, &devInfoData) && com < 1) {
+		BYTE friendly_name[300];
+		SetupDiGetDeviceRegistryProperty(hDevInfo, &devInfoData,
+			SPDRP_FRIENDLYNAME, NULL, friendly_name, sizeof(friendly_name), NULL);
+		auto fn = tstring((TCHAR*)friendly_name);
+
+		// デバイス検索
+		if (fn.find(deviceStr) != tstring::npos) {
+			size_t start = fn.find(_T("(COM")) + 4;
+			com = _tstoi(fn.substr(start).c_str());
+			//_tprintf(_T("Found : %s\n"), fn.c_str());
+		}
+	}
+	SetupDiDestroyDeviceInfoList(hDevInfo); // デバイス情報セットを解放
+
+	return com;
+}
+
+
 }; // namespace nkc
diff --git a/ECTrainer2/ComPort.h b/ECTrainer2/ComPort.h
index 673e18f..e19dec5 100644
--- a/ECTrainer2/ComPort.h
+++ b/ECTrainer2/ComPort.h
@@ -13,7 +13,6 @@
 	HANDLE _ComHandle;
 
 public:
-
 	ComPort(void);
 	~ComPort(void);
 	int Open(TCHAR* config, char* sendStr, int sendLen, char* checkStr, int checkLen);
@@ -22,6 +21,7 @@
 	DWORD Send(const BYTE* data, DWORD dataLen);
 	DWORD Receive(BYTE* buffer, DWORD bufferLen);
 	DWORD WaitReceive(BYTE* buffer, DWORD bufferLen, int timeout);
+	static int FindDevice(const TCHAR* deviceStr);	// COMポート一覧取得 
 };
 
 }; // namespace nkc