A sliding headliner for a motor vehicle that is movably guided on guides on both sides and that comprises a flexible shading element, whereby the invention provides that the shading element is tightened by two side profile strips of the sliding headliner, which strips are movably guided on the two guides, that each guide has a front guide section and a rear guide section, that the two side profile strips are held at a distance from one another by the rear guide sections under tightening of the shading element in the transverse direction and are guided in a non-tightened manner in the transverse direction by the front guide sections, and that the side profile strips are held at a distance from one another in the transverse direction on the front guide sections by their own bending stiffness and/or by a cross bow.