Abstract: The device for cleaning support bars of a first workpiece support of a first laser cutting machine, which support includes support bars running substantially parallel to one another and each extending longitudinally, includes a supporting structure supporting a cleaning head and a movement mechanism for moving the head relative to the supporting structure. The movement mechanism includes a lifting mechanism for moving the head vertically and a longitudinal carriage for moving the head along the support bars. The supporting structure has a carriage for moving the supporting structure on a floor surface transversely, which results in the supporting structure being movable transverse to the support bars. The supporting structure is movable by the carriage towards and away from the first laser cutting machine location and towards a a second laser cutting machine location to clean support bars of a second workpiece support of the second laser cutting machine.