Guding device for a sliding opening, opening and motor vehicle equipped with such device

The device has lateral sliding channels in an opening, in which small plane blades (11, 12) are moved between closed and free positions. Each channel has two sides, surrounding the blades, of which the spacing is greater within a curved zone to allow the passage of the blades within the curved zone. A guiding unit clings to a blade against one side within the curved zone, while the blades are in their closed position. An Independent claim is also included for an automobile vehicle equipped with a sliding leaf.