Through holes (11, 12, 13 . . . ) are made at predetermined locations of a stator core (1). Reinforcing bars are inserted thereinto while fixed to the stator core by welding (81, 82, 83 . . . ). The stator core is supported between a front bracket (31) and a rear bracket (32) from both sides. Front side tap bolts (91, 92, 93 . . . ) and rear side tap bolts (61, 62, 63 . . . ) are engaged through the front bracket and the rear bracket with internal threads of both ends of the reinforcing bars, thereby fixing in place the stator core, front bracket, and rear bracket. By the foregoing structure, it is possible to improve the heat radiation action of a stator core, and also achieve a compacter motor.