Abstract: A wire harness manufacturing system which issue a working instruction for manufacturing a wire harness to a worker using a network composed of an upstream network and a downstream network, comprising: a clamping pole having a plurality of wire clamps; a jig having a designating portion corresponding to each clamp; a first computer for managing data necessary to manufacture wire harnesses; a second computer for creating an operation instruction file; a third computer for checking the operation instruction file against a master file to create data available for all manufacturing steps; a fourth computer for allotting the file data processed by the third computer to each wire clamping pole, a server for supplying the operation instruction file data to the downstream network; a plurality of information terminal devices which are connected to the servers to requite data necessary for actual operations and provide each designation signal to said designating portion; and a scanner for supplying the number of the cla