JOINT STRUCTURE OF WIRE HARNESS

PROBLEM TO BE SOLVED: To provide a joint structure of a wire harness which is thinned, can be arranged at an arbitrary position of an automobile, and can be easily assembled at a low cost. SOLUTION: In a joint structure of a wire harness, an insulating film 20 is stuck on a single side or both sides of a wiring circuit body structure 10. In the wiring circuit body structure 10, a large number of flexible flat cables(FFC) 11 are separately arranged without intersecting. Connection parts 12 for connecting tip parts of wire harnesses 30 where a plurality of FFCs 31 are arranged in parallel with the FFCs 11 of the wiring circuit body structure 10 are arranged. In the insulating film 20, window parts 21 are formed at positions corresponding to the connection parts 12.