strDrive = "Z:" Set objFSO = WScript.CreateObject("Scripting.FileSystemObject") If Err.Number = 0 Then nFlag = False For nCount = 1 To 180 ' 180秒まで待ってみる nFlag = objFSO.DriveExists(strDrive) If nFlag = False Then WScript.Sleep(1000) ' 1秒待ってみる End If Next