PURPOSE: A light guide lamp is provided to increase the lifetime of a product by preventing degradation in beforehand. CONSTITUTION: A first surface(110) disperses or refracts light by projecting the light provided thorough a lamp part. A light emitting surface(120) is touched with an edge of the first surface. The light emitting surface is formed along a longitudinal direction of a prism. The light emitting surface is formed into a quadrangle with a predetermined area along the longitudinal direction of the prism. A diffused reflection surface(130) is arranged adjacent to the light emitting surface along a triangular shape prism while being touched with the edge of the first surface. A reflecting surface(140) is combined with the light emitting surface among two or more light emitting surfaces.
