Abstract: A two-dimensional mounting structure for an industrial robot or robot manipulator on a carriage with a lifting post and a manipulator connected to the post, the mounting structure includes longitudinal rail carriers, transverse connectors and a movable rail, carriages are connected to the movable rail which runs on the longitudinal carriers, the carriage for the robot runs on the movable rail; the improvement includes essentially similarly constructed end elements, first ones of the end elements connecting the ends of the longitudinal carriers to ends of the transverse connectors, others of the end elements connecting respective two ends of the movable rail to carriage means by means of which the transverse rail carrier runs on the longitudinal carrier; each end element comprises a basic configuration that includes two flat plates and a shaft in the bores with aligned bores, a connecting plate interconnecting the two plates from which they extend in downward direction, for connection to a transverse connector