A suspender arm (1) for suspending machinery such as welding equipment, for example, has a swing beam (4) supported rotatably in a horizontal plane at its base end by a base member (2) actuated vertically and/or horizontally by electric motors according to demand, a slide beam (5) disposed to the swing beam (4) slidably in the longitudinal direction of the swing beam (4), a hanger (6) disposed to the slide beam (5) movable along the slide beam for suspending a wire feeder (54) of the welding equipment and some rings attached slidably to respective wires stretched between both ends of the swing beam (4) and the slide beam (5) for suspending cables of the welding equipment. <IMAGE>
