PROBLEM TO BE SOLVED: To provide a thickening composition which shows an extremely high thickening property even by addition of a small amount of thickening agent, and to provide a cosmetic including the same.SOLUTION: Provided is a thickening composition including a water-absorbing resin and a modified material of polyalkylene oxide, and a cosmetic including the same.COPYRIGHT: (C)2015,JPO&INPIT【課題】少量の増粘剤の添加でも極めて高い増粘性を示す増粘組成物及びこれを含有してなる化粧料を提供すること。【解決手段】吸水性樹脂とポリアルキレンオキシド変成物を含有する増粘組成物、及びこれを含有してなる化粧料。【選択図】なし