PROBLEM TO BE SOLVED: To provide a rubber band tightly binding implement which always fits a rubber band to a body and has no possibility of separating the rubber band from the body even when an opening part of a bag is opened.;SOLUTION: In the rubber band tightly binding implement, a projected part 3 for hooking a rubber band is projected on one of left and right facing end parts on one end part on one face side of a plate-like body 1, and a projected piece 5 with a rubber band fitting hole 4 is projected on the other end part, and a cutout channel for inserting and removing the rubber band with a smaller channel width than the diameter of the rubber band 2 is formed in the rubber band fitting hole 4 on the projected piece 5, and the rubber band 2 is inserted into the rubber band fitting hole 4 from the cutout channel 6. The opening part 7a of the bag 7 is wrung and the plate-like body 1 is fitted thereon, and the rubber band 2 is wound a plurality of times on the wrung part 7o to tightly bind the wrung part 7o and to hook the tip part 2a of the rubber band 2 to the projected part 3.;COPYRIGHT: (C)2005,JPO&NCIPI
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