To provide: an artificial nail composition which can reduce odor and can form a cured product excellent in curability and durability； and a nail decorating material, an artificial nail, and the like.SOLUTION: The composition comprises an acrylamide compound represented by the general formula (1) in the figure in an amount from 20 mass% to 50 mass% inclusive, a polyfunctional monomer in an amount from 40 mass% to 70 mass% inclusive, and a polymerization initiator. In the formula, Rrepresents a C1-6 alkyl group, and X represents a C1-6 alkylene group.SELECTED DRAWING: None【課題】臭気を低減でき、硬化性及び耐久性に優れた硬化物が得られる人工爪組成物、爪加飾材、人工爪などの提供。【解決手段】下記一般式（１）で表されるアクリルアミド化合物を２０質量％以上５０質量％以下、多官能モノマーを４０質量％以上７０質量％以下、及び重合開始剤を含有する組成物である。Ｒ１は炭素数１～６のアルキル基を表し、Ｘは炭素数１～６のアルキレン基を表す。【選択図】なし
