A wire harness includes a wiring member, an exterior member through which the wiring member is inserted, and a protector that is fixed to a vehicle and holds the exterior member. The protector includes a holding member that holds the exterior member, a fixing member that is fixed to the vehicle, and a tubular member that is formed in a tubular shape and on which the holding member and the fixing member are disposed. At least one of the holding member or the fixing member includes a columnar structure that is formed in a columnar shape and is slidingly fittable into the tubular member.