Abstract: This invention provides a process for producing a wire-harness, in which by arranging connectors having exposed connection ends on a working stand at intervals corresponding to intervals in the product, holding these connection ends on one of welding electrodes, cutting in succession wires on a reel station in prescribed lengths and removing an insulating coating from the cut ends of the wires by an NC tape-controlled automatic wire-cutting and coating-removing device, overlapping the cut ends of the wires on the connection ends of respective elements of the connector by a wire-laying head, and moving the other electrode downwardly to the above-mentioned one electrode to weld the cut ends of the wires to the connection ends of the connector elements in the overlapped state, all the production operations including the operation of connecting wires to connectors being performed substantially automatically.