Abstract: A working apparatus is provided with a head support horizontally pivotably carried by a link mechanism having first and second link elements, which mechanism is operable for horizontally freely moving the head support. The head support is provided with a follower roller, which is horizontally moved along a guide track, so that a working head such as a workpiece loading and unloading device mounted on the head support can be moved along the guide track between first and second service positions which are respectively located over a machine tool and a workpiece conveyer. In order to secure contact engagement between the follower and the guide track, the follower in one specific configuration is constructed by a magnet roller and in another specific configuration, is constructed by a roller which is urged to contact the guide track by a pressure roller movable together with the roller along guide track.