To form a power outputting device easily using an existing unit, capable of outputting sufficient torque at the time of powering a motor generator and preventing a rotating shaft from excessive rotation at the time of regenerating operation.

This power outputting device is provided with a device consisting of an engine 30, a torque converter 130, and a transmission 140 which are existent and unitized on a main shaft, and a device consisting of a two-speed transmission 100 and a motor 70 which are mounted on a sub shaft disposed in parallel with the main shaft so as to be connected by a power transmission mechanism 120 which mutually-transmits power mechanically. When required torque is low at a low speed, the transmission 100 is shifted to a lower gear so that the motor 70 may drive a driving shaft 162, and at any other timing, the engine 30 drives the driving shaft 162. When braking is applied to the driving shaft 162, the transmission 100 is shifted to a higher gear for regenerative control so as not to excessively-rotate the rotating shaft 78 of the motor 70.