The valve timing control is executed by an ECU (4000) that controls an engine and an electric-motor ECU (4100) that control an electric motor (2060). The ECU (4000) and the electric-motor EDU (4100) serve different functions. The ECU (4000) sets the target phase of an intake valve based on the engine operating state, and prepares the rotational speed command value (Nmref) for the electric motor (2060) that serves as an actuator such that a phase feedback control loop (7000), in which the intake valve phase is caused to match the target phase, is formed. The electric-motor EDU (4100) forms a feedback control loop (7100) for the motor speed, in which the electric power (PW) supplied to the electric motor (2060) is controlled such that the electric motor (2060) rotates in accordance with therotational speed command value (Nmref).