An electric motor includes a rotor which is rotatably supported by a first bearing which is provided at a first end part on an output shaft side and a second bearing which is provided at a second end part opposite to the first end part, a stator which is provided with a winding and which surrounds the rotor, a front housing part which supports the first bearing and which forms a winding accommodation space which accommodates the winding, a rear housing part which supports the second bearing, an air feed port to which pressurized air is fed, and an air flow path which linearly extends from said air feed port to a space surrounding the first bearing and communicates with the winding accommodation space.