IN-WHEEL MOTOR-DRIVEN DEVICE

An object of the present invention is to reduce an axial dimension of an in-wheel motor driving device 21 in which a motor section A and a wheel hub bearing section C are connected coaxially in series via a speed reducer section B, thereby providing a large inside space of a vehicle as well as increasing freedom of routing a power supply wires 61. A terminal box 62 for the power supply wires 61 which supply power to the motor section A is disposed on the outer circumferential side surface of the housing 22a which holds the motor section A. The power supply wires 61 are routed out of the terminal box 62 to an inboard side and are anchored by an power supply wire holder 63 which extends perpendicularly to an axial centerline of the housing 22a.