The purpose of the present invention is to provide a keratin fiber treatment composition that is capable of retaining the shape (style) of keratin fibers over an extended period of time and that also has an exceptional feel on use. The present invention pertains to a keratin fiber treatment composition characterized by containing a sugar alcohol. This keratin fiber treatment composition preferably also contains one or both urea and/or a urea derivative or a hair-styling resin. The pH of this keratin fiber treatment composition is preferably within the range of 4.0-7.5.本發明之目的在於提供一種可持續長時間保持角蛋白纖維之形狀(造型)，而且使用觸感亦優異之角蛋白纖維處理組合物。本發明係關於一種角蛋白纖維處理組合物，其特徵在於含有糖醇。本發明之角蛋白纖維處理組合物較佳為進而含有脲及/或脲衍生物或者整髮樹脂中之任一者或兩者。本發明之角蛋白纖維處理組合物較佳為將其pH值設為4.0～7.5之範圍內。
