To improve energy efficiency and miniaturize an electric motor.

A crankshaft 26 of an engine 22 is connected to a ring gear 32 of a planetary gear P, a driving shaft 65 to a carrier 31, and a rotary shaft of a motor MG1 to a sun gear 31 respectively so that power outputted from the engine 22 can be outputted to the driving shaft 65 by amplifying torque, when stopping rotation of the motor MG1. A rotary shaft of a motor MG2 is also constituted so as to be connectable to the driving shaft 65 via a clutch C1 and to the crankshaft 26 of the engine 22 via a clutch C2. The rotary shaft of the motor MG2 is connected to the driving shaft 65 or connected to the crankshaft 26. Thus, the energy efficiency can be improved by switching the clutches C1 and C2 in response to an operation state of the driving shaft 65.

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