Abstract: The invention relates to a sliding-bow tarpaulin system for lorries or lorry trailers, with a plurality of runner and guide rails, which extend on the loading area of the lorry along the longitudinal sides of the loading area and in which roller carriages, with retaining bow members that are positioned thereon and are realized like portals, are displaceably guided, and with a tarpaulin attached to the retaining bow members. In order to provide a sliding-bow tarpaulin system, where a tautening of the tarpaulin in the upper region is possible, at least one of the retaining bow members, in particular a retaining bow member that is not realized so as to be displaceable and/or is provided at one end of the loading area, is to be realized in its bottom region so as to be tiltable about a pivotal axis.