A wireless relay apparatus relaying wireless communication between a transmission station and a receiving station includes M (M is an integer >1) receiving antennas receiving a radio signal from the transmission station, a signal processing section performing orthogonal transformation and phase rotation on M received signals received by each of the receiving antennas as an input signal so as to obtain M output signals having a same average power level, and M transmission antennas individually transmitting the M output signals obtained by the signal processing section to the receiving station.