To increase efficiency of wireless power feeding to a moving object in wireless power feeding. A wireless power feeder 116 feeds power by wireless from a plurality of feeding coils L2 to an EV 108 including a receiving coil L3. The feeding coils L2 are arranged along a moving direction of the EV 108 and receive power from a power supply circuit including a plurality of power transmission control circuits 200. The power supply circuit 102 makes a first feeding coil L2 supply AC power to the EV 108 when the EV 108 passes through the first feeding coil L2 and, at the same time, prepares power feeding from a second feeding coil L2 through which the EV 108 has not passed.