PROBLEM TO BE SOLVED: To provide a power feeding system capable of reliably feeding power to an in- body robot by a non-contact power feeding method without giving a subject a cooped-up feeling by feeding power with a power feeding coil arranged only on one side of the subject.SOLUTION: There is provided a power feeding system equipped with an in-body robot 50 with a power receiving coil, and a power feeding coil 10 for feeding power to the in-body robot 50. The power feeding coil 10 includes a core formed like a flat plate, a coil wound around the core, and a shield body that covers the region where the coil is wound, and feeds power to the power receiving coil of the in-body robot 50, the power feeding coil 10 being arranged only on one side of a subject. The power receiving coil includes three sets of coils whose coil winding surfaces are orthogonal to each other.
