SOLENOID VALVE

PROBLEM TO BE SOLVED: To stabilize the operation of a plunger with a simple structure. SOLUTION: A plunger 15 provided with a small-diameter part 15a and a large-diameter part 15b is fitted into a hollow hole 13a of a bobbin 13 of a solenoid 11 so as to be freely moved in the axial direction, and it is energized to a valve main body 12 side by a spring 17. A fitting protrusion 33 to be fit to a hole part 21a of a cover 21 is provided on the valve main body 12, a fitting hole 34 to which the large-diameter part 15b of the plunger 15 is to be fitted is provided on the valve main body 12 including the fitting protrusion 33, and the fitting hole 34 fits and holds the plunger 15 with a small clearance. A valve part 35 provided with a valve port 36 is projectingly provided on the innermost part of the fitting hole 34, the valve port 36 is communicated with an inflow port 31 through a fluid passage 37, and the fitting hole 34 is communicated with an outflow port 32 through a fluid passage 38. The valve port 36 is normally closed by the plunger 15 energized by the spring 17, the plunger 15 is attracted by a fixed iron core 14 with electrification to a coil 18, and the valve port 36 is released.