To provide a non contact power transmission device which controls a temperature while suppressing power consumption in an AC power source.

An atmospheric temperature in a housing 25 that houses an AC power source is controlled by a housing fan 40. A temperature is locally controlled in the housing 25 by cooling fans 41, 42. A power source side controller 26 controls the housing fan 40 and the cooling fans 41, 42 on the basis of the operation state of the AC power source.