ENGINE STARTING DEVICE

Provided is an engine starting device that makes it possible to restart the engine without any loss of engine startability while preventing an excessive load current from flowing into a starter motor. The engine starting device includes a pinion (13) that meshes with a ring gear (20) connected to the engine, a solenoid switch (11) that moves the pinion in the direction of the ring gear using current supplied by a battery (50), a starter motor (14) that rotates the pinion using the current, and a starter control unit (110) that, on the basis of a signal from a control device (70) which gives instructions for starting the engine, supplies the necessary current to the starter motor and the solenoid switch. The starter control unit is provided with a starter motor load determination unit that determines the load status of the starter motor based on the starter motor terminal voltage, when the starter motor is rotated via the signal.