Shading blind for a roof window of a motor vehicle

A shading blind for a roof window of a motor vehicle, having two guide rails, a roller blind element which has two lateral, flexible guide structures with which it is guided in the guide rails, and a receiving space for the roller blind element, the roller blind element being adjustable between an extended position in which it is largely located outside the receiving space, and a retracted position in which it is largely located in the receiving space, wherein the receiving space, measured in an adjustment direction of the roller blind element, has a length which is approximately half of an adjustment path between the extended and the retracted positions, a height of the receiving space, measured perpendicularly to a plane of the roller blind element located between the guide rails, is such that when the roller blind element is deflected in the receiving space by approximately 180°, the guide structures are only elastically deformed and a rear edge of the roller blind element is permanently attached in the receiving space, wherein a cross bar is provided in the receiving space, to which the rear edge of the roller blind element is firmly connected, the roller blind element deflected by at least 180°.