Turn lamp for vehicle outside mirror

A turn lamp for a vehicle outside mirror, the turn lamp comprising a light guide lens having an elongated shape with a shape of a front surface having a long direction and a short direction, the light guide lens including a transparent material, and a light source arranged on a back side of the light guide lens, a light beam emitted from the light source entering a predetermined position on the back side of the light guide lens and being radiated from surfaces of respective parts of the light guide lens to an outside of the light guide lens while being guided inside the light guide lens,

• wherein the turn lamp includes a reflective surface arranged on the back side of the light guide lens,
• wherein the light source emits a light beam with an optical axis directed in one direction;
• wherein a part of the light beam emitted from the light source obliquely enters the light guide lens toward one end in the long direction of the light guide lens without being reflected by the reflective surface;
• and
• wherein another part of the light beam emitted from the light source is reflected by the reflective surface and obliquely enters the light guide lens toward another end in the long direction of the light guide lens.