A driving unit and a power-generating unit are separately supported on a sub-frame in such a manner to isolate vibration and are spaced away from each other in a vehicle front-rear direction, to realize good noise/vibration control ability. With respect to an external input acting in the vehicle front-rear direction, a weakened part of a mount bracket extended over the power-generating unit to the driving unit induces and promotes a buckling distortion, to demonstrate good energy absorption ability.