To solve a problem of a conventional side rear lighting system for a vehicle body that light is projected onto a door mirror, and is dazzling to a following vehicle, and causing hindrance to the field of view.

In the side rear lighting system for the vehicle body equipped with a light source for lighting the side rear of the vehicle body on a lower part of a stay of the door mirror, the light source is inputted interlockingly with an input switch of a small light or a width indicator, a lighting direction angle is fixed toward a rear wheel, a light shielding cover is provided on an upper part of the light source, and at least one of the light sources of an auxiliary turn signal is provided on the stay of the door mirror in a front downward position of the vehicle body.