PROBLEM TO BE SOLVED: To provide a hair cosmetic composition excellent in preparation stability even if compounded with a carbonate, and imparting the hair with favorable brightness.SOLUTION: The hair cosmetic composition constituted as a hair dye or hair decolorant and to be applied onto the hair by mixing a first agent and a second agent together when to be used, is provided, being characterized in that the first agent includes the following components (A)-(C): (A) potassium carbonate (B) a higher alcohol and (C) a cationic surfactant.COPYRIGHT: (C)2013,JPO&INPIT【課題】炭酸塩を配合しても製剤安定性に優れ、かつ毛髪に良好な明度を付与する毛髪化粧料組成物を提供すること。【解決手段】染毛剤又は毛髪脱色剤として構成され、使用時に第1剤と第2剤を混合して毛髪に適用される毛髪化粧料組成物であって、第1剤に下記(A)成分~(C)成分を含有することを特徴とする毛髪化粧料組成物。(A)炭酸カリウム、(B)高級アルコール、(C)カチオン性界面活性剤。【選択図】なし