A wiring structure of a wire harness in which the wire harness is wired by being fixed to an adhesive member laid on a surface of a roof lining of an automobile is provided. At least a part of a plurality of electric wires constituting the wire harness in a length direction are sandwiched between two belt-shaped tapes in which both side edges in the width direction are fixed to each other, are arranged side by side in the width direction of the tapes, and are attached to an adhesive surface provided on an inner surface of at least one of the two tapes, thereby holding the bundle of the electric wires in a flat shape, and an outer surface of one of the two tapes is attached to the adhesive member, whereby the wire harness is fixed to the surface of the roof lining.