To obtain a guide rail of a door of an electric car having durability similar to that of a conventional aluminum guide rail without being immersed in water at the time of raining and being contaminated at a normal time even when it is located at an end of an entrance/exit, while a step light with light emitting diodes linearly provided at an end which is a flat part of the entrance/exit of a vehicle is difficult to keep water tightness in its structure.

Bottoms on both of side walls of an aluminum die-cut material with a U-shaped cross section serve as opening, and mounting holes are bored on a top face opposed to the openings at a predetermined interval. Furthermore, through holes are bored between the mounting holes so as to form a guide rail body. Then, a printed circuit board mounted to light emitting diodes at predetermined intervals, electrically connected with each other, and mounted to screw stops at constant intervals is entirely and integrally constituted in a manner that the light emitting diodes are fitted to the through holes from the opening of the guide rail body and transparent or semi-transparent synthetic resin is filled between the top face of the printed circuit board and an inner face of the top face part and in the respective through holes.