The present invention is provided with: a pair of transmission power sources (1) that supply electrical power at a single frequency; a transmission/reception unit (3) comprising a plurality of systems of transmission antennas (5), which wirelessly transmit electrical power from the pair of transmission power sources (1), and a plurality of systems of reception antennas (6), which receive electrical power from the respectively paired transmission antennas (5); a plurality of systems of transmission power source circuits (2) that establish the resonance conditions of the respectively paired transmission antennas (5); and a plurality of systems of reception power source circuits (4) that establish the resonance conditions of the respectively paired reception antennas (6). Each transmission power source circuit (2) outputs a half-wave resonance waveform that does not have a period in which waves overlap by incrementing the phase of the voltage or current with respect to each electrical power among neighboring systems of transmission antennas (5).