PURPOSE: To reduce the number of parts and the number of assembling steps in the connection of a lamp body with a cover by forming the lamp body having a reflecting surface and a cover for covering the lamp body by plastics, respectively, and providing a cylindrical part for fitting the lamp body on the cover.

CONSTITUTION: To connect a cover 1 to a lamp body 11 at the time of assembling, the lamp body 11 is first inserted into the cover 1 from the front side, and the cylindrical part 14 of the lamp body 11 is inserted into the cylindrical part 6 of the cover 1. Then, the rear part of the lamp body 11 is mounted onto the top end part of an arm 18. consequently, the elasticity of plastics itself allows the mutual connection of the cover 1 and the lamp body 11 only by the mutual fitting of the cylindrical bodies 6, 14. When a lamp 26 is lighted for illumination, the light from the lamp 26 is reflected and collected by the reflecting surface 15 of the reflector part 13 of the lamp body 11, and radiated from a lighting opening 12.