A voltage limiting circuit of a solenoid drive device includes a function to limit the value of a boost voltage generated by a boost voltage power source circuit. The voltage limiting circuit is equipped with a boost voltage comparing unit and a boost voltage discharge unit. The boost voltage comparing unit compares a voltage-divided value of the boost voltage with a reference voltage value, and in the case that the voltage-divided value is higher than the reference voltage value, the boost voltage discharge unit lowers the voltage-divided value to be less than or equal to the reference voltage value.