PROBLEM TO BE SOLVED: To provide an antiwrinkle agent immediately showing an effect of improving wrinkles.SOLUTION: The antiwrinkle agent contains as an effective component a copolymer composed of 20-95 mol% of a constituent unit (a) represented by formula (1) and 5-80 mol% of a constituent unit (b) represented by formula (2).COPYRIGHT: (C)2011,JPO&INPIT【課題】即時的にしわ改善作用を示す抗しわ剤の提供。【解決手段】式(1)で表される構成単位(a)20~95モル%及び式(2)で表される構成単位(b)5~80モル%からなる共重合体を有効成分として含む抗しわ剤。【選択図】なし