Exterior member and wire harness

An exterior member for a wire harness which is formed in a tube shape so as to accommodate and protect one or a plurality of conduction paths, the exterior member includes an outer layer structure part that has an outer surface and that is an outermost layer, an inner layer structure part that has an inner surface and that is an innermost layer, and an intermediate layer structure part that is oneor a plurality of layers between the outer layer structure part and the inner layer structure part. 种用于线束的外部部件，该外部部件形成为管状，从而容纳并且保护个或者多个导电路径，该外部部件包括：外层结构部，该外层结构部具有外表面，并且是最外层；内层结构部，该内层结构部具有内表面，并且是最内层；以及中间层结构部，该中间层结构部是在外层结构部与内层结构部之间的层或多层。