To provide a controller for a solenoid drive valve capable of shortening a movement time from the separation of a moving element from a valve to the contact of the moving element with an electromagnet, and preventing the increase of the consumed power.

A valve clearance estimating part 55 estimates a valve clearance length on the basis of a position signal of a moving element detected by a moving element position sensor 1 and the acceleration of a movable part estimated by a movable part acceleration estimating part 56. A current controlled variable operating part 51 calculates a current command value to be supplied to the electromagnet corresponding to a target position signal of the moving element determined on the basis of the valve clearance length by a target control position determining part.