A slide rail for an automotive vehicle seat comprising a first profile, a second profile and a lock, in which: the lock is movably mounted between an unlocked position and a locked position, the lock has a first series of teeth and a second series of teeth, remote from one another in an upright direction, the first series of teeth has a first stop surface and a second stop surface, opposing one another, coming into contact with the first profile to immobilize the lock relative to the first profile along a longitudinal direction, and the second series of teeth has a first stop surface and a second stop surface, opposing one another, coming into contact with a second profile to immobilize the lock relative to the second profile along the longitudinal direction.