The invention concerns a shade system for a motor vehicle, said system being adapted to obscure a transparent bodywork element. Said shade system comprises at least one shade guideway, a winding shaft and lateral elements wherein are guided the lateral edges of the shade guideway. The lateral edges of the shade guideway have each a flat and flexible driving band. In order to ensure that said diving bands are wound on the winding shaft and are unwound therefrom in a specific manner, a lateral winding guide is arranged at the winding shaft for each driving band, said winding guides preventing the driving bands from being laterally offset at the winding shaft.