A wire harness producing device configured to produce a wire harness by displaying a wire laying-out drawing in a full size in a length direction on a plurality of display devices, and laying-out electric wires along the wire laying-out drawing. The device includes a displaying control section configured to look up operation recipe information configured as a database capable of identifying wire laying-out order numbers of the electric wires, and in turn display wire laying-out position indicators configured to indicate positions of the electric wires to be laid out, on the plurality of display devices, according to a wire laying-out order of the electric wires. The operation recipe information includes coordinate information for indicating displaying positions for the wire laying-out position indicators. The displaying control section is configured to display the wire laying-out position indicators, in the displaying positions indicated by the coordinate information on the plurality of display devices.