Clamp for use in wire harness

A clip (10) having a plate (12), which plate is fixed to the wire harness with the mounting portion (11) on the harness. Two rods (14) spaced apart (12) protruding from the plate. Bridge portion (14) connecting rod (15) facing the portion, thereby forming a cavity (18). Flap support member (17) projecting from an end portion of each rod (15) and the flap (16) projecting downwardly and outwardly from the tip of each fin support (17). Body locking part (16a) is formed at the tip of each flap (16). When the wire harness is pulled out in a direction from the vehicle body to the flap (16) of the locking body portion (16a) is unlocked from the locking hole when the bridge portion (14) toward the cavity (18) twist.