PROBLEM TO BE SOLVED: To provide a resin deformed shape retainer for twisted binding which ensures excellent twisted binding performance without a core material. SOLUTION: The deformed shape retainer for twisted binding has a flat shape. The deformed shape retainer is made by adding a plasticizer of 1 to 10 mass% to a polyvinyl chloride resin. It is preferable that the plasticizer contains an epoxidized soybean oil. It is also preferable that the polyvinyl chloride resin composition contains an alkyl methacrylate-butadiene-styrene copolymer of 1 to 10 mass%. COPYRIGHT: (C)2012,JPO&INPIT