Vehicle seat, in particular rail vehicle seat, with an upholstery element fixing frame

The seat i.e. trajectory seat (1), has a seat part, and a backrest comprising a detachable fastening frame (4) that is arranged between a base frame (7) and a back cushion element (5). The fastening frame is provided for fastening the cushion element to the base frame and detachable from the base frame. The fastening frame has an outer frame part that runs along an area of an outer edge of the cushion element and along an outer edge profile of the base frame. The outer frame part has hook profile elements, where the fastening frame is made from plastic material.