Abstract: A longitudinal adjustment device for longitudinally adjusting a vehicle seat comprises a first guide rail extending longitudinally along a longitudinal direction, and a second guide rail extending longitudinally along the longitudinal direction and being displaceable along the longitudinal direction relative to the first guide rail and having two opposing rail legs and a rail base connecting the rail legs. Arranged on the second guide rail is an actuating device for adjusting the guide rails relative to each other in an actuated state, and/or for retaining the guide rails in a longitudinal position relative to each other in non-actuated state. An angle bracket disposed on the second guide rail for holding the actuating device on the second guide rail is designed U-shaped with two legs and a base connecting the legs.