A wire harness (9) includes an exterior member (16) with a tubular shape which covers a high-voltage conductive path (15), and a drain hole (27) is formed in the exterior member (16). The drain hole (27) is covered with a clamp (20), that is, a post-installed member in a state that the function of the drain hole is ensured. The clamp (20) includes a tube attachment portion (32), and the tube attachment portion (32) includes a drain function ensuring portion (34). A gap (35) is formed between the drain hole (27) and the clamp (20). A foreign substance entry preventing portion (36) is formed in a side of the gap (35) in a vehicle progress direction P. An outside communication hole (37) is formed in an opposite side in the vehicle progress direction P.