PROBLEM TO BE SOLVED: To control the occurrence of shock or shaking to a vehicle when an internal combustion engine is started.

SOLUTION: When a start of an engine 22 is demanded in a stop state, a position where rotational movement becomes least is set as a locking position, based on the rotational position of the rotor of a motor MG2 as a three-phase AC synchronous motor connected to a ring gear shaft 32a linked to front wheels 38a, 38b. By controlling the switching of an inverter 42 in such a way that DC currents are impressed to two phases of three-phase coils corresponding to the set locking position, the ring gear shaft 32a is locked by the motor MG2. After locking the ring gear shaft 32a, the engine 22 is cranked up by a motor MG1. This structure enables the motor MG2 to receive the reaction force of the ring gear shaft 32a side that acts when the engine 22 is cranked by the motor MG1. Therefore, the occurrence of shock or shaking to the vehicle can be controlled when the engine is started in the stop state.

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