PROBLEM TO BE SOLVED: To provide a composition capable of forming a cured product excellent in hydrophilicity, curability, flexibility and adhesiveness suitable for adhesion to an organism.SOLUTION: The invention provides: a monofunctional acrylamide compound with an ester structure represented by one of the general formulas (1) and (4) in the figure, where the ring X represents a C2-5 ring structure including a nitrogen atom; and a composition thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】生体を接着するのに適した親水性、硬化性、柔軟性、接着性に優れる硬化物が得られる組成物の提供。【解決手段】下記一般式(1)及び(4)のいずれかで表されるエステル構造を有する単官能アクリルアミド化合物、及びその組成物である。環Xは窒素原子を含む炭素数2~5の環構造を表す。【選択図】なし