PROBLEM TO BE SOLVED: To provide a hair treatment agent mixed with a new modified peptide and a raw material for this hair treatment.SOLUTION: The hair treatment agent is mixed with the modified peptide including one or more side chain groups having a unit selected from the group consisting of a structure expressed by the formula (I): -S-S-CH2-CH(NH2)-COOH and salts thereof. It is suitable to use a material prepared by dissolving this modified peptide in a solvent as the raw material for the hair treatment agent.COPYRIGHT: (C)2013,JPO&INPIT【課題】新規な変性ペプチドが配合された毛髪処理剤、及びこの毛髪処理剤用原料の提供。【解決手段】毛髪処理剤には、下記式(I)で表される構造及び当該構造の塩から選ばれた単位を有する側鎖基を一種又は二種以上備える変性ペプチドを配合する。この変性ペプチドを溶媒に溶解させたものを、毛髪処理剤用原料として用いると良い。-S-S-CH2-CH(NH2)-COOH (I)【選択図】なし
