IN-WHEEL MOTOR DRIVING DEVICE

An object of the present invention is to provide an in-wheel motor driving device which includes a highly adaptable suspension mounting portion, is light weighted, and has reduced drag friction at the time of steering operation. An in-wheel motor driving device comprises : a motor section A which rotates a motor-side rotation member; a speed reducer section B which reduces and transmits rotation of the motor-side rotation member to a wheel-side rotation member; and a wheel hub connected and fixed to the wheel-side rotation members. The above three elements are disposed in series from an inboard side to an outboard side of a vehicle, and suspension mounting brackets 60 are fixed onto an outer surface of the speed reducer section's housing. Arms of a suspension 12b are attached via the suspension mounting brackets 60.