An automatic transmission using a torque converter as a starting apparatus comprises a stator hub, an one-way clutch both of which are offset on the pump impeller side respectively, a brake cylinder case provided in an inner diameter portion of the torque converter, a brake piston provided in the brake cylinder case, a part or the whole of a reverse brake and a part of or the whole of a planetary gear which are accommodated in the inner diameter portion of the torque converter, thereby the axial length of the automatic transmission can be reduced.