A head restraint for a vehicle seat is provided, wherein at least one first part facing the head of the seat occupant can be moved linearly in the direction of the head of a seat occupant, wherein during the relocating motion, a relative motion between the first part and a second part of the head restraint arranged on a third part occurs, and a contact surface of the first part lies against a contact surface of the second part, and a contact surface is provided with a form-fit element, in particular a toothing arrangement. A method is provided for adjusting a head restraint.