Protection device for a storage space of a motor vehicle. Such a protection device having a cartridge housing, in which at least one flexible planar formation is supported so as to be able to be wound and unwound, wherein the cartridge housing is able to be positioned so as to be secured to the storage space in vehicle-side retention receiving members, wherein the retention receiving members can be displaced inside the storage space by means of a kinematic displacement system, is known. According to the invention, the kinematic displacement system has vehicle-side linear guides, which extend with a main direction component in the vertical direction of the vehicle and in which the retention receiving members are guided, and there is provided a storage-space-base-side recess in which the cartridge housing is arranged in a recessed manner in a rest position. Use in private motor vehicles.