The invention provides a solenoid valve (1), configured such that a plunger (60) is attracted upon energization of a hollow cylindrical solenoid part (20) to move a valve element (75) includes a flarepipe (50) having a sliding inner surface (51a) on which the plunger (60) slides. The flare pipe (50) includes a large-diameter portion (53) having a larger diameter than the sliding inner surface. Inside the large-diameter portion (53), a compression spring (59) is accommodated to urge the plunger (60) in a direction toward a valve seat (73).