A wire harness for routing in a vehicle in which an exhaust pipe through which exhaust gas flows is attached under a floor, the wire harness including: a first wire to be routed alongside the exhaust pipe; and a second wire to be routed on an opposite side of the first wire to the exhaust pipe, wherein the first wire has: a conductor and an insulation coating covering an outer periphery of the conductor; and a metal tube housing the conductor and the insulation coating.