To solve the problems that a chain is often wrenched from a chain fixing metal piece since the chain is pulled strongly when a drain plug is tightly closed, that an original part drops into a drain hole upon repairing and is lost, requiring extra time for repairing, and that extra time is required to clean a bathtub since a cleaning sponge is hooked near the chain fixing metal piece, while cleaning can be conducted smoothly where there is nothing like the chain fixing metal piece.

A float etc. is fitted to the chain of the drain plug of the bathtub or a wash basin to allow it to float on the water surface or in the water instead of fixing it to the body of the bathtub or the wash basin. The drain plug can be removed by pulling the float etc.