A power-supplying module and a power-receiving module are positioned so that a coil surface of a power-supplying resonator in the power-supplying module and a coil surface of a power-receiving resonator in the power-receiving module face each other. On the inner circumferential surface sides of the coils of the power-supplying resonator and the power-receiving resonator, cylindrical magnetic members and which cover the entire inner circumferential surfaces of the coil of the power-supplying resonator and the coil of the power-receiving resonator are arranged. When power transmission between the power-supplying resonator and the power-receiving resonator is performed, while varying the magnetic field, magnetic field occurring around the power-supplying resonator and the power-receiving resonator is shielded by the magnetic members. This improves power transmission efficiency of power transmitted from the power-supplying module to the power-receiving module, as compared with a case of arranging no magnetic members.