Abstract: An arrangement in a motor vehicle safety harness permitting said harness to be fastened in various positions of adjustment and comprising a slide to which one end of the harness is attached, said slide running along a guide member and provided both with a locking pin moving freely in a bore in said slide, and also with a clamping bolt, said bolt arranged, when turned in one direction, to press said locking pin into engagement with said guide member, thus fastening the harness in the desired position along the guide member.