A high-voltage harness routing structure includes: a subframe; a driving power unit; an electric power distribution unit; an electrical auxiliary unit arranged to cause the driving power unit to be sandwiched between the electric power distribution unit and the electrical auxiliary unit; and a high voltage harness connecting the electric power distribution unit with the electrical auxiliary unit in a routing path. In this routing path, the high voltage harness drops from the electric power distribution unit toward the subframe and then extends along the subframe in a vehicle-width direction. The high-voltage harness routing structure further includes a driving power unit mount including a mount main body arranged apart from the subframe to form a space between the mount main body and the subframe; and a protector that covers at least a high-voltage harness's portion extending along the subframe in the vehicle-width direction and interfering with the driving power unit mount. The high voltage harness covered by the protector is passed through the space.