A power feeding system (2) including a transmission antenna (5) for wirelessly transmitting an electric power from a power source (6), and a receiver antenna (12) having a receiver coil (12b) wound around an outer periphery of a substantially bar-like core (12a) for receiving the electric power which has been transmitted are provided. The core of the receiver antenna has at least one end area tilting at a predetermined angle with respect to a linear area.
