A truck tractor (1) having, in addition to the driver and passenger seats (27, 29) in the driver cabin, a kitchenette (39) with a sink (43) and a stove (41) as well as a refrigerator (45) in an upper level. A bench (23) serves for dining, which is arranged behind a table (38). The living area is accessed via stairs (26) from a lower level, in which a half bath and a shower stall as well as a sleeping area with a bed and the appropriate infrastructure are located for the living area and the engine (1).