PURPOSE: To shorten manufacturing man-hours, and lower manufacturing cost by letting a single dad section made of material lower in refraction factor than the transparent material of each light emitting section entirely cover the whole of the light emitting sections, forming a plurality of the light emitting sections, and forming the clad section in one operation thereafter in such a way that it can cover the whole of the light emitting sections.

CONSTITUTION: The high mount stop lamp 10 which has no clad section 14 divided, is so constituted that its light emitting sections 13 are injection molded, and its clad section 14 is formed by injection molding thereafter in such a way that circumference of each aforesaid light emitting section is covered. It is so designed that the single clad section 14 made of resin lower in refraction factor than the transparent resin of each light emitting section 13 entirely covers the whole of light introducing body groups 131. After the light introducing body groups 131 have been formed by injection molding and the like, since the clad section 14 is formed by injection molding and the like in one operation in such a way that the light introducing body groups are covered, manufacturing hours can thereby be shortened, and manufacturing cost is also lowered as compared with a former technique where the number of clad sections 14 are same as many as that of the light introducing body groups.