A head restraint is guided and at least indirectly held in a frame part of a seat, in particular of a backrest of a motor vehicle seat, via at least one holding element which can be positioned at various height levels relative to the frame part by way of an actuating element. The actuating element interacts with at least one locking element. The actuating element is operated with a first, second, and third operating action. A first operating action of the actuating element permits height adjustment of the head restraint and a second operating action permits removal thereof from the frame part of the seat. The second operating action, for removing the head restraint, can be carried out in parallel with or after a third operating action on at least one blocking member that is integrated in the actuating element.