A seat adjustment mechanism for a vehicle seat may have a number of first rail pairs, each first rail pair having an upper rail and a lower rail. A height adjustment mechanism may be arranged between the number of first rail pairs and a seat part of the vehicle seat. The height adjustment mechanism may have a number of second rail pairs, each second rail pair may have an upper rail and a lower rail. The number of first rail pairs and the number of second rail pairs can be actuated simultaneously.