WIRELESS POWER TRANSMISSION SYSTEM

The wireless power transmission system according to the present disclosure includes: a supply device installed on the road side and transmitting electric power; a vehicle equipped with a power receiving device and traveling on the road; wherein in the wireless power transmission system, a power receiving device receives power from a supply device and wirelessly transmits the power to a vehicle, the supply device is a primary coil that generates a magnetic field for transmitting power to the vehicle; a first communication device that performs short-range wireless communication with the vehicle; the vehicle includes a secondary coil that receives power transmitted contactlessly from the primary coil; a second communication device that performs short-range wireless communication with the supply device; in the first and second communication devices, one communication device has a single communication unit, and the other communication device has a plurality of communication units.