PURPOSE: To prevent the stay of the solvent gas among the adhesive agent inside of a lamp main body by sealing one lead support insertion hole with the adhesive agent, and after adhering a lens, sealing the other lead support insertion hole with the adhesive agent.

CONSTITUTION: A lens is adhered after a lead support insertion hole 18, in which a lead support 24 is inserted, is sealed by the adhesive agent 19, and thereafter, the other lead support insertion hole 17, in which a lead support 23 is inserted, is sealed by the adhesive agent 19. Since after the solvent gas, which is evaporated from an adhesive agent layer between a reflector and the lens, is flowered outside of the reflector from the insertion hole 17, which is not sealed yet, this insertion hole 17 is sealed by the adhesive agent 19, stay of the solvent gas inside of a sealed lamp main body is eliminated. Consequently, the intrusion of the solvent gas on the reflector can be prevented.