The invention concerns a shade system (10,40,50) for a motor vehicle, said system being adapted to obscure a transparent bodywork element. Said shade system comprises at least one shade guideway (12), a winding shaft and lateral guide elements (18, 20) wherein are guided the lateral edges of the shade guideway (12). The lateral edges of the shade guideway (12) have each a flat and flexible driving band (22A, 22B). In order to ensure that said driving bands (22A, 22b) are wound on the winding shaft (16) and are unwound therefrom in specific manner, a lateral winding guide (28A, 28B;42;52) is arranged at the winding shaft (16) for each driving band (22A, 22B), said winding guides (28A, 28B;42;52) preventing the driving bands (22A, 22B) from being laterally offset at the winding shaft.