STARTER SYSTEM

Provided is a starter system capable of rapidly restarting an engine in response to an engine restart request issued on the way to an engine stop, and reducing noise generated at the time of engagement between a pinion and a ring gear of the engine. This starter system includes: a pinion which transmits power for starting an engine to a ring gear connected with the engine; a motor which rotates the pinion; a magnet switch which pushes the pinion out toward the ring gear; a one-way clutch which prevents transmission of the power of the motor in the reverse rotation direction of the pinion; and a controller which controls the motor and the magnet switch. The controller controls the magnet switch such that the magnet switch meshes the pinion with the ring gear when the following conditions are satisfied after an engine stop: (1) both the rotation direction of the ring gear and the rotation direction of the pinion are normal directions; and (2) when a first rotation speed of the ring gear is higher than a second rotation speed synchronous with the rotation speed of the pinion.