A contactless power transfer system supplies power from a power transmitting device to a vehicle in a contactless manner. The power transmitting device and the vehicle are configured to be capable of exchanging information with each other through radio communication. The vehicle is provided with an RFID tag in which information on the vehicle is stored in advance. The power transmitting device includes an RFID reader that reads out information from the ID tag in a contactless manner. A power transmitting ECU recognizes that the vehicle is a vehicle to be supplied with power from the power transmitting device if vehicle information indicated by information from the ID tag corresponds to vehicle information indicated by information received through radio communication.