PURPOSE: To prevent irregular move, entanglement, etc., of fiber bundles in a loop sling comprising endlessly wound loop bundles of hard fibers enclosed with hard skin by parting the fiber bundles uniformly in the right side and left side of the skin, and sewing a center of the skin with hard parting yarn.

CONSTITUTION: A loop sling A comprises a number of loop fiber bundles 2 enclosed with skin 1 and uniformly parted in the right side and left side of the skin 1, and its center is sewn with hard yarn 3. Free motion of the fiber bundles 2 in the skin 1 is thus prevented by the parting yarn 3 uniformly parting the fiber bundles to the right and left. In addition, sewing yarn 4 is that doubly sewn to prevent separation at sewn parts at both ends 5, 5a of the skin 1. Deflection of the fiber bundle to one side or their irregular entanglement with each other can thus be prevented, slip and twisting in usage can be prevented, and durability is improved.