To perform reliable and easy work of mounting a branch rope on and demounting it from a main rope by a method wherein a metal fitting to reliably, simply, and rapidly mount the branch rope on and demount it from the main rope without needing a special skill for basket fishing.

An annular body having a mounting hole to which a branch rope for mooring a capturing basket is tied and a main rope grasping hole 15 formed in an central part is formed such that two ends are lapped with each other by two members 2A and 2B made of a metal. The other ends of one ends, lapped with each other, of two members 2A and 2B are openably intercoupled and a through hole extending through during closing is formed in the lapped part of the other end part. A lock pin 3 is removably inserted in the passing-through drafty hole and a lock pin fixing means is arranged at the annular body.