An elevator, comprising an elevator car (1), car guide rails (3) on one side of the elevator car (1), an elevator shaft or equivalent (5), at least one stop block (9) attached to the car guide rails (3) or to the elevator shaft or equivalent (5), at least two movable stop blocks (7) attached to the elevator car (1), the latter stop blocks (7) being arranged to be moved transversely relative to the elevator shaft direction into a position aligned with at least one stop block (9) attached to the car guide rails (3) or elevator shaft or equivalent (5) and away from said position aligned with said stop block (9). The aforesaid at least two movable stop blocks (7) attached to the elevator car are connected to each other by a horizontal shaft (10) oriented substantially in a direction parallel with the wall of the elevator car (1) on the side of the car guide rails (3) to synchronize the motion of the movable stop blocks (7).