PROBLEM TO BE SOLVED: To provide a novel composition for use in including and fixing an object.SOLUTION: A composition according to the present invention has a heat dependent gel that turns from a solution state into a gel state at a predetermined temperature as a boundary, and a swelling polymer that is included in the heat dependent gel and is different from a material forming a porous structure of the heat dependent gel, where the swelling polymer is dispersed in a pore of the porous structure.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】対象物を内包して固定するために用いる新規な組成物を提供する。【解決手段】本発明に係る組成物は、所定の温度を境として溶液状態からゲル化する熱依存性ゲルと、熱依存性ゲルの内部に含まれ、熱依存性ゲルの多孔性構造を形成する物質とは異なる膨潤用ポリマーとを含み、膨潤用ポリマーは、多孔性構造が有する細孔内に分散されている。【選択図】なし