A spout nozzle for a scum removal device (N) which removes scum (S) by spouting pressure water in water where the scum (S) floats, comprising a nozzle body having an inlet-side housing part into which the pressure water is supplied, and a tip-end-side nozzle part communicated with the inlet-side housing part and formed into a flat cylindrical shape in which a width is larger than a height, and a valve body provided in the tip-end-side nozzle part of the nozzle body and can open/close an opening of the tip-end-side nozzle part , wherein the valve body has a valve main body part formed in a plate shape; a base end part of the valve main body part is rotatably held on a vicinity of an upper wall of a base end part of the tip-end-side nozzle part via a hinge shaft along the width direction; a tip end of the valve main body part is arranged in an opening of the tip-end-side nozzle part , with being vertically movable between a position of forming an upper opening above the valve main body part by being in contact with an upper surface of a lower wall of the tip-end-side nozzle part and a position forming a lower opening below the valve main body part by being in contact with a lower surface of an upper wall of the tip-end-side nozzle part ; the valve main body part is rotated downward by its own weight and close the lower opening when the pressure water is not supplied to the inlet-side housing part and of being rotated upward by a pressure of the pressure water and open the lower opening when the pressure water is supplied, a closing part is provided at the tip end part of the valve main body part to stand up upward at a position of protruding from the opening , the closing part is formed in size of closing the upper opening formed between the valve body and the lower surface of the upper wall of the tip-end-side nozzle part when the valve body closes the lower opening . the valve body has a valve main body part formed in a plate shape; a base end part of the valve main body part is rotatably held on a vicinity of an upper wall of a base end part of the tip-end-side nozzle part via a hinge shaft along the width direction; a tip end of the valve main body part is arranged in an opening of the tip-end-side nozzle part , with being vertically movable between a position of forming an upper opening above the valve main body part by being in contact with an upper surface of a lower wall of the tip-end-side nozzle part and a position forming a lower opening below the valve main body part by being in contact with a lower surface of an upper wall of the tip-end-side nozzle part ; the valve main body part is rotated downward by its own weight and close the lower opening when the pressure water is not supplied to the inlet-side housing part and of being rotated upward by a pressure of the pressure water and open the lower opening when the pressure water is supplied, a closing part is provided at the tip end part of the valve main body part to stand up upward at a position of protruding from the opening , the closing part is formed in size of closing the upper opening formed between the valve body and the lower surface of the upper wall of the tip-end-side nozzle part when the valve body closes the lower opening . <EOS>