Abstract: The present invention relates to a safety device (3) for a vehicle bench seat (1) that can be moved via two lateral, parallel guide tracks (2) within a vehicle across an adjustable range and can be locked in various positions, consisting of a safety rail (4), which is arranged roughly in the center between the guide tracks (2) and parallel to these tracks, and of a safety sled (6), which is guided in a relatively flexible manner at least across the actual adjustable range of the bench seat (1). The safety sled (6) is arranged in such a manner that it can move freely lengthwise to the safety rail (4) during regular sliding motions and in positions within the adjustable range of the bench seat (1) and interlocks with the safety rail (4) due to irregular deformations in the area of the bench seat (1).