A cover system for a load bed of a vehicle having a winding shaft mounted rotatably in a support structure, a flexible flat structure mounted on the winding shaft for winding and unwinding between a rest position and a covering position and connected to a pull-out profile on a front end region spaced from the winding shaft. Two guide rail arrangements on opposite sides of the flat structure are provided, in which the pull-out profile is guided, and drive system is provided which has a drive motor and a drive transmission laid in the guide rail arrangement and acting on the stable pull-out profile. The drive motor is configured as an electric tubular motor integrated in the winding shaft and driving the winding shaft in opposite rotational directions.