Vehicle Seat

A vehicle seat has a lower seat part and a seat backrest. The seat backrest has a backrest structure, a central backrest section which has at least one backrest cushion and a backrest cover, and a left and a right backrest side wall. The seat backrest is provided with at least one expansion element which has at least one cavity that is enclosed by a membrane and can be filled with an expansion fluid from a fluid source. At least one respective fillable cavity of the at least one expansion element is integrated into the backrest cushion of the central backrest section or is provided between the backrest structure and the backrest cushion of the central backrest section to the left and the right of the backrest longitudinal central plane at a lateral distance thereto.