Motor generator and automobile carrying the same

A motor generator and an automobile carrying the motor generator. In the motor generator, a yoke part (20) comprises a projected part projected from the axial end face of a tooth (10) to the axial outside in a stator core (100) formed of a pressed powder magnetic substance. The tooth (10) is so formed that its axial length is gradually decreased toward the radial outside of the stator core (100) and its circumferential length is gradually increased toward the radial outside of the stator core (100). The stator core (100) is so formed that a height difference between the axial end face of the yoke part (20) and the axial end face of the tooth (10) is roughly equal to the axial length of a coil end part in any cross section perpendicular to the radial direction of the stator core. Also, the cross sectional area of the tooth (10) in a direction vertical to the radial direction is approximately constant toward the radial outside, and the cross sectional area is secured at a joining part between the tooth (10) and the yoke part (20). In addition, the half of the cross sectional area can be secured in the circumferential cross section of the yoke part (20).