To provide a wiring harness and a routing structure of the wiring harness able to prevent high temperature and its influence caused by heat generation. A wiring harness includes a harness main body having a plurality of high voltage conducting lines. The high voltage conducting lines are arranged with gaps between the adjacent high voltage conducting lines. Further, the plurality of high voltage conducting lines are arranged to maintain an interval as the gap. It becomes a routing structure of the wiring harness when curved portions of such high voltage conducting lines are directly or indirectly made contact with a shield cover covering the wiring harness. Because the high voltage conducting lines of the wiring harness are arranged with gaps between the adjacent high voltage conducting lines, radiation performance of the wiring harness is better than the wiring harness of which high voltage conducting lines are bundled.