To provide a solenoid valve drive mechanism enabling a reduction in size by reducing the number of parts without lowering the drive performance of a solenoid valve.

An injector drive device comprises a boosting circuit and a high-tension driving FET. Also, the boosting circuit comprises a boosting capacitor of such a capacity that can supply a valve opening current and a valve holding current to the solenoid coil of an injector. The valve opening current and the valve holding current are supplied from the boosting circuit to a solenoid coil through the high-tension driving FET. Thus, the drive performance of the solenoid valve can be secured, and the device can be downsized by simplifying a circuit to reduce the number of parts.