PROBLEM TO BE SOLVED: To provide a compound which exhibits a higher effect of preventing wrinkle formation, a higher effect of improving wrinkles, a higher effect of making the skin beautiful, and a higher effect of improving skin quality than conventional retinol and retinol derivatives in a sustained manner, and a method for producing the same, and an external composition for the skin and a sheet-shaped cosmetic each containing the same as an active ingredient.SOLUTION: Disclosed are retinol-modified collagen in which a dicarboxylic acid is attached to at least one hydroxyl group of collagen and retinol is attached to a carboxyl group of at least one attached dicarboxylic acid, a method for producing the same, and an external composition for the skin and a sheet-shaped cosmetic each containing the same as an active ingredient.SELECTED DRAWING: None【課題】従来のレチノールおよびレチノール誘導体よりも優れたシワ形成防止効果、シワ改善効果、美肌効果および肌質改善効果を持続的に奏する化合物、その製造方法ならびにそれを有効成分として配合する皮膚外用組成物およびシート状化粧料を提供すること。【解決手段】コラーゲン中の少なくとも1つのヒドロキシル基にジカルボン酸が結合し、少なくとも1つの結合した該ジカルボン酸のカルボキシル基にレチノールが結合したレチノール修飾コラーゲン、その製造方法ならびにそれを有効成分として配合する皮膚外用組成物およびシート状化粧料。【選択図】なし