Longitudinal adjusting device for a vehicle seat, comprising a separable upper and lower rail

The invention relates to a longitudinal adjusting device for a vehicle seat, comprising a lower rail (2) and an upper rail (3), wherein the upper rail (3) is arranged longitudinally displaceably in the lower rail (2). According to the invention, the upper rail (3) is engaged with the lower rail (2), wherein a retaining and guiding element (15) is designed, integrally formed or arranged on an upper edge (14) of the lower rail (2), said element holding the upper rail (3) on the lower rail (2) in the operating position, and wherein at least two locking elements (9) are arranged on and/or integrated in the upper rail (3) and after same are unlocked, the upper rail (3) and a vehicle seat attached thereto in a predefined position can be separated from the lower rail (2).