Trim part with an integrated light source, in particular the headliner

A lining part, in particular a roof lining (1) for the interior (6) of a motor vehicle is provided with a planar light source radiating according to the invention one to the visible side (10), the plate-shaped light conductor (7) which at least regionally flush with the visible side of the trim panel extends frontally and is in operative connection with at least one luminous means (9).