To reduce sliding resistance generated between a guide hole and a shaft part of a movable body.

When a movable body 34 is in a state attracted to a stator core 33 side by electromagnetic force, a spring seat surface 3422 is located on a valve element 36 side relative to an end of a shaft part guide hole 351 on an armature part 341 side. Accordingly, when the movable body 34 is driven to the side opposite to the stator core side by energization force of a valve spring 37, inclination of a shaft part 342 by a spring load is hardly generated, and sliding resistance between the shaft part guide hole 351 and the shaft part 342 can be reduced.