A control device that that performs starting control for an internal combustion engine. A first transition control during which a first engagement device is caused to transition from a disengaged state to a slipping engagement state is started after the starting request for the internal combustion engine is made. A rotational speed control in which the rotary electric machine is controlled such that a rotational speed of the rotary electric machine becomes a target rotational speed is started before the first engagement device transitions from the disengaged state to the slipping engagement state. A rotational speed control is terminated and torque control in which the rotary electric machine is controlled after the first engagement device transitions from the disengaged to the slipping engagement state, and the second engagement device is caused to transition from a direct engagement state to a slipping engagement state after the torque control is started.