A method of manufacturing an automobile high voltage wire harness includes setting a shrinkable tube which has a color to make the wire harness recognized as a high voltage one outside a metal pipe body which is an exterior member of one or a plurality of high voltage electrical pathway(s) wired in an automobile, making the shrinkable tube shrink to cover part of or all of the outer surface of the metal pipe body, and bending the metal pipe body to a predetermined position to be formed into a three-dimensional shape.