A wireless power transmission device supplies power by means of a resonance phenomenon, from a power supply module equipped with at least a power-supply resonator to a power-receiving module equipped with at least a power-receiving resonator. For the power-supply resonator and the power-receiving resonator, a value for a transmission characteristic of a power source frequency for power is set so as to have two peak bands, and By setting the power source frequency for the power supplied to the power supply module to the power source frequency band corresponding to one of the two peak bands of the transmission characteristic, magnetic field spaces having a magnetic field strength less than the surrounding magnetic field strength are formed in the area near the power-supply resonator and the power-receiving resonator.