PROBLEM TO BE SOLVED: To provide an excellent agent for maintaining the stem-cellular property of epidermis, and to provide an agent for maintaining undifferentiated state of an epidermal cell.SOLUTION: There is provided an agent for maintaining stem-cellular property of epidermis containing an extract of a plant of the genus Blechnum of Blechnaceae as an active ingredient. There is also provided an agent for maintaining undifferentiated state of an epidermal cell containing an extract of a plant of the genus Blechnum of Blechnaceae as an active ingredient. Preferably, the plant of the Blechnum is Blechnum discolor.COPYRIGHT: (C)2013,JPO&INPIT【課題】 優れた表皮の幹細胞性維持剤及び表皮細胞未分化状態維持剤を提供すること。【解決手段】シダ目シシガシラ科(Blechnaceae)ヒリュウシダ属(Blechnum)植物の抽出物を有効成分とする表皮の幹細胞性維持剤;シダ目シシガシラ科(Blechnaceae)ヒリュウシダ属(Blechnum)植物の抽出物を有効成分とする表皮細胞未分化状態維持剤。前記ヒリュウシダ属植物が、ブレクナム・ディスカラー(Blechnum discolor)であるのが好適である。【選択図】なし