PROBLEM TO BE SOLVED: To provide a novel fructose absorption inhibitor.SOLUTION: A fructose absorption inhibitor contains as an active ingredient a chalcone derivative or a salt thereof represented by the general formula (1) (where, R1 represents a hydrogen atom, a hydroxy group, or a C1-6 alkoxy group, R2 represents a hydrogen atom or a hydroxy group, R3 represents a hydrogen atom, a hydroxy group, or a C1-6 alkoxy group, R4 represents an unsaturated aliphatic hydrocarbon group of a straight chain or branched chain of carbon number 3-15, and R5 represents a hydrogen atom, a hydroxy group, or a C1-6 alkoxy group).COPYRIGHT: (C)2016,JPO&INPIT【課題】新たなフルクトース吸収阻害剤の提供。【解決手段】一般式(1)(式中、R1は水素原子、ヒドロキシ基又はC1-6アルコキシ基を示し、R2は水素原子又はヒドロキシ基を示し、R3は水素原子、ヒドロキシ基又はC1-6アルコキシ基を示し、R4は炭素数3~15の直鎖又は分岐鎖の不飽和脂肪族炭化水素基を示し、R5は水素原子、ヒドロキシ基又はC1-6アルコキシ基を示す。)で表されるカルコン誘導体又はその塩を有効成分とするフルクトース吸収阻害剤。【選択図】なし