A robochain including a plurality of link units, a connecting member (1300) between the link units, a hollow part formed inside the link unit (1100) for enabling the connecting member (1300) to be detachably attached to each of the link units, and a neck part (1316) formed in the connecting member (1300) for preventing the connecting member (1300) from being easily detached from the hollow part (1118). Repair of a link plate is facilitated by simply separating the engaging part of the connecting member from the hollow part.