PROBLEM TO BE SOLVED: To provide a pellet type controlled release resin composition having high blocking effect and is excellent in long term storage stability.SOLUTION: The controlled release resin composition is formed of at least base resin and a functional additive. The controlled release resin composition is formed into a pellet state, and an antiblocking agent having 100 ml/100 mg or more of oil absorption adheres to the surface of the composition.COPYRIGHT: (C)2015,JPO&INPIT【課題】高いブロッキング効果を有し、長期間の保管安定性に優れたペレット状の徐放性樹脂組成物を提供する。【解決手段】徐放性樹脂組成物を、ベース樹脂と機能性添加物とを少なくとも含んで構成する。この徐放性樹脂組成物をペレット状に成形し、その表面に吸油量が100ml/100mg以上のブロッキング防止剤を付着する。【選択図】なし