Non-contact power feeding device

In a non-contact power feeding device 22 of the present invention, power is fed through an air gap G with no contact from a power transmission coil 3 of a power feeding side circuit 19 to a power receiving coil 8 of a power receiving side circuit 20, which are located to face each other, based on a mutual induction effect of electromagnetic induction. In such a non-contact power feeding device 22, a resonant coil 16 of a repeating circuit 15 is disposed on the power transmission coil 3 side and/or the power receiving coil 8 side. The resonant coil 16 is wound in parallel on the same plane as the power transmission coil 3 and/or the power receiving coil 8. The resonant coil 16, the power transmission coil 3 and the power receiving coil 8 are respectively composed of a single insulated conducting wire or a number of insulated conducting wires.