Abstract: A sunshade for a motor vehicle roof (2) with a shade screen (5) which can be wound onto a winding rod (6) and which is located underneath the roof, the opposing side edges of the shade screen are movably guided in the direction of shade motion on guide rails (7) and are held in the transverse direction with pre-tensioning of the shade screen (5). To produce pretension in the transverse direction without tensioning elements or bars which are permanently attached to the shade screen and which would hinder rewinding, it is provided that the engagement elements, which are guided on the guide rails (7), can be coupled to the side edges of the length (5) of shade when it is unwound to keep the length (5) of shade pre-tensioned in the transverse direction, so that the sunshade (4) located under an arched vehicle roof (2) can follow the arch of the roof, but can be disengaged for the shade screen (5) as it is wound onto the winding rod so as to enable the shade screen to be wound more compactly.

Abstract: A sunshade for a motor vehicle roof (2) with a shade screen (5) which can be wound onto a winding rod (6) and which is located underneath the roof, the opposing side edges of the shade screen are movably guided in the direction of shade motion on guide rails (7) and are held in the transverse direction with pre-tensioning of the shade screen (5). To produce pretension in the transverse direction without tensioning elements or bars which are permanently attached to the shade screen and which would hinder rewinding, it is provided that the engagement elements, which are guided on the guide rails (7), can be coupled to the side edges of the length (5) of shade when it is unwound to keep the length (5) of shade pre-tensioned in the transverse direction, so that the sunshade (4) located under an arched vehicle roof (2) can follow the arch of the roof, but can be disengaged for the shade screen (5) as it is wound onto the winding rod so as to enable the shade screen to be wound more compactly.