An elongated light guiding lens can include an incident portion and a light guiding portion with an L-shaped cross section. The incident portion can be erected at a rear end portion of the light guiding portion, and have a second incident surface at its left end, for receiving light from an LED while collimating the light in the vertical direction. The light guiding portion can extend forward while expanding leftward more than the position corresponding to the second incident surface, and include a second reflection surface provided below the second incident surface to internally reflect the light from the second incident surface toward a side reflection surface of a left end side surface. The side reflection surface can include a plurality of first lens cuts configured to internally reflect the light reflected by the second reflection surface to a light exiting surface of the front surface portion.