Abstract: Slide rail for vehicle seat comprising two profiles, a latch and an unlocking device moveable into an active position to hold the latch in the unlocked position in order to allow the seat to slide forward, this unlocking device being then held in its active position by a pivoting hook. On this hook is mounted a pivoting actuator finger designed to retract elastically without causing the hook to pivot when it passes over a fixed stop when the seat slides forward, and to pivot in the opposite direction by releasing the hook when it meets the stop during a rearward movement of the seat.