The invention provides a turn signal lamp having a camera and a light guiding body and can inhibit the increase of the air resistance. Provided is a turn signal lamp (10) including a light source (20), a light guiding body, and a camera having an image capture device, which are installed within a lamp chamber (S) formed by a lamp body (11) and an outer cover (12). At least a portion of the light guide is formed in an area that extends from the camera in a direction following a vehicle surface.