An ejection nozzle member attached to a vehicle-mounted camera is formed from an elastic material, and includes a cover member mounted on an upper surface of a casing, the cover member having therein an air passage to which compressed air is supplied. A pair of seal members are formed in an air ejecting unit, from which the compressed air is ejected, on outer sides of the air passage in a widthwise direction. The seal members are formed in lip shapes, protruding downward and toward the center in the widthwise direction on a side of the air passage. When the ejection nozzle member is attached to the camera, distal ends of the seal members are placed in contact mutually on the side of the air passage, and are pressed toward the casing by the compressed air that flows in the air passage to thereby be placed in intimate contact therewith.