To provide a wind power utilization system which has extremely low resistance to air and can efficiently obtain electrical energy from wind power.

A wind power utilization system 10 includes a wind-receiving rotor 2 which is attached to a front part of an automobile 1 that is one of powered moving means, a power-generating means 3 which operates by the rotation of the wind-receiving rotor 2, a battery 4 which stores electrical energy generated by the power-generating means 3, and a control circuit 5 therefor. The wind-receiving rotor 2 includes a conical body part 7 which is rotatably supported to the automobile 1 via a support shaft 6, and a plurality of wind-receiving parts 8 which are formed on the side surface 7a of the conical body part 7 so as to form radial helices from the shaft center 7c of the conical body part 7. The wind-receiving parts 8 are each formed in the state of standing in a rib shape from the side surface 7a of the body part 7.