Abstract: A wiring harness producing apparatus is provided which has an excellent space efficiency and a simple construction, and is capable of easily and efficiently producing a wiring harness. There are provided a wire feeding unit 21 for feeding a plurality of wires 11, a wire aligning unit 23 for aligning the respective wires 11 in parallel with each other, and a wire arrangement table 24 for linearly arranging the wires 11 aligned in parallel with each other. On the wire arrangement table 24, a connector connecting unit 26 for pressingly connecting a connector 25 with the respective wires 11, a wire lifting unit 28 for lifting the wires 11, circuit length adjusting units 29 each including a wire length adjusting tool 14 formed with steps 15 with a specified inclination which are brought into pressing contact with the wires 11 to set different loosened lengths for the respective wires 11, and a connector fixing unit 27 for fixing the connector 25 are provided along a wire feeding direction P.