<p>A clamp for wire harness, wherein a lock piece (15) with a lock claw (17) is projectedly formed on the opening end side of a cover part (12), and a part (18) to be locked having a lock piece insertion hole (19) on its inner peripheral side and a bracket insertion hole (20) on its outer peripheral side is formed on the opening end side of a body part (11). A space between the lock insertion hole (19) and the bracket insertion hole (20) is partitioned by a partition wall (21) on its upper side. An engaged claw (23) to be engaged with the lock claw (17) of the lock piece (15) is so formed at the lower end of the partition wall (21) as to project toward the inner peripheral side. An engaging claw (25) to be engaged into a lock hole (31) formed in a bracket (30) is so formed at the upper end of the outer peripheral side wall (24) of the bracket insertion hole (20) and at a position below the engaged claw (23) as to project toward the inner peripheral side. When the lock claw (17) is brought into a half-locked state with the claw (23), the partition wall (21) is projected toward the bracket insertion hole (20) side, and the bracket (30) cannot be inserted into the bracket insertion hole.</p>
