A unit support for a motor vehicle door includes at least one longitudinally extended guide rail of a motor vehicle window lifter arranged on the unit support, which extends between a first and a second end portion and on which a drive element serving to receive a window pane to be adjusted along an adjusting path of the guide rail defined by guide surfaces is movably guided. A hollow body is integrally formed on the unit support in the region of at least one end portion of the guide rail. The hollow body extends the guide surfaces of the guide rail serving to guide the drive element, defining the adjusting path and/or a deflection element is provided on the hollow body for deflecting a flexible traction means of the window lifter, in order to increase the length of travel of the motor vehicle window lifter in the direction of extension of the guide rail.