A fluid control valve includes: a valve main body including an inlet port and an outlet port, each being formed on opposite side surfaces; and a mounting plate attached to a lower end of the valve main body; wherein the valve main body has side surfaces located perpendicular to the opposite side surfaces and formed with locking protrusions, the mounting plate is formed with locking arms each extending from an upper end of the mounting plate, the locking arms each having a locking pawl facing and engaging with the protrusion, the valve main body is formed with an annular rib about an central axis on the lower end of the valve main body, and the upper end of the mounting plate is formed with a press-fit rib including a press-fit portion press-fitted in a wall surface of the annular rib.