A seat belt arrangement for a vehicle seat having a seat part and a back part and which is positioned substantially centrally between the nearside and offside of a vehicle. First and second anchorage points are provided on the vehicle structure on opposite sides of the seat part, the first anchorage point providing an anchorage for one end of the seat belt and the second anchorage point comprising a latching mechanism for receiving a latch carried by the seat belt. A third anchorage point comprising a retractor system is located on the vehicle structure behind the seat. The first, second and third anchorage points are each located at a relatively low position; and an upper mounting provided on the back part (towards an upper end thereof) is at a higher level than the first, second and third anchorage points. In a secured position, a seat belt extends behind the back part of the seat from the retractor system to the upper mounting, through the upper mounting, in front of the front of the back part diagonally from the upper mounting to the latching mechanism of the second anchorage point and over the seat part from the latching mechanism to the first anchorage point.