A child safety seat (1) for a vehicle, the child safety seat (1) comprises a seat body (2) and a frame (3) which is removably secured to or securable onto an existing vehicle seat (VS) in a rearward configuration, the seat body (2) comprising a back portion (20) and a seat portion (21), the frame (3) being pivotably attached to the back portion (20) of the seat body (2) such that, in use, the seat body (2) is arranged to pivot about the pivotable attachment to the frame (3) during a vehicular accident.