A wireless power relaying device comprising: first, second, and third magnetic bodies (114-1, 114-2, 114-3) arranged so that the first magnetic body is between the second magnetic body and the third magnetic body, and a distance between the first magnetic body and the second magnet body is the same as a distance between the first magnetic body and the third magnetic body, first, second and third relay coils wound around the first, second and third magnetic bodies (114-1, 114-2, 114-3), respectively, wherein the first relay coil, the second relay coil and the third relay coil are connected in series and wherein a direction in which the first relay coil is wound around the first magnetic body is different from a direction in which the second relay coil is wound around the second magnetic body and a direction in which the third relay coil is wound around the third magnetic body, the direction in which the second relay coil is wound around the second magnetic body is the same as the direction in which the third relay coil is wound around the third magnetic body, and the first, second, and third magnetic bodies (114-1, 114-2, 114-3), and the first, second and third relay coils, are thereby configured so that a current is inducible in the first, second and third relay coils by a first magnetic field from a first external device, and the induced current causes a second magnet field to be produced by the first, second and third relay coils through which a power signal is transmittable to a second external device; characterized in that the wireless power relaying device further comprises: a power supply circuit configured to supply power to the wireless power relaying device; and a load module configured to perform a function using the supplied power; wherein the power supply circuit comprises a power supply coil arranged on the first magnetic body, and wherein the power supply coil is wound in the same direction as the first relay coil is wound around the first magnetic body. first, second, and third magnetic bodies (114-1, 114-2, 114-3) arranged so that the first magnetic body is between the second magnetic body and the third magnetic body, and a distance between the first magnetic body and the second magnet body is the same as a distance between the first magnetic body and the third magnetic body, first, second and third relay coils wound around the first, second and third magnetic bodies (114-1, 114-2, 114-3), respectively, wherein the first relay coil, the second relay coil and the third relay coil are connected in series and wherein a direction in which the first relay coil is wound around the first magnetic body is different from a direction in which the second relay coil is wound around the second magnetic body and a direction in which the third relay coil is wound around the third magnetic body, the direction in which the second relay coil is wound around the second magnetic body is the same as the direction in which the third relay coil is wound around the third magnetic body, and the first, second, and third magnetic bodies (114-1, 114-2, 114-3), and the first, second and third relay coils, are thereby configured so that a current is inducible in the first, second and third relay coils by a first magnetic field from a first external device, and the induced current causes a second magnet field to be produced by the first, second and third relay coils through which a power signal is transmittable to a second external device; characterized in that the wireless power relaying device further comprises: a power supply circuit configured to supply power to the wireless power relaying device; and a load module configured to perform a function using the supplied power; wherein the power supply circuit comprises a power supply coil arranged on the first magnetic body, and wherein the power supply coil is wound in the same direction as the first relay coil is wound around the first magnetic body. a power supply circuit configured to supply power to the wireless power relaying device; and a load module configured to perform a function using the supplied power; wherein the power supply circuit comprises a power supply coil arranged on the first magnetic body, and wherein the power supply coil is wound in the same direction as the first relay coil is wound around the first magnetic body.