PROBLEM TO BE SOLVED: To provide a treatment agent for hair which is combined with liquid hydrocarbon, is transparent in appearance, besides can confirm a washout by vision, and also improved temporal stability.SOLUTION: A treatment agent for hair is transparent before use, has an appearance of generating turbidity when diluting it with water, and is used in washout mode, which is combined with (A) liquid hydrocarbon, (B) one or more kinds of liquid ester oil selected from liquid ester oil of branching alcohol and straight-chain fatty acid, and liquid ester oil of linear alcohol and branched-chain fatty acid, and (C) a nonionic surface active agent.COPYRIGHT: (C)2015,JPO&INPIT【課題】液状炭化水素が配合され、外観が透明である上に、洗い流しを視覚により確認でき、更には経時的安定性を向上させた毛髪用処理剤の提供。【解決手段】(A)液状炭化水素、(B)分枝アルコールと直鎖脂肪酸との液状エステル油、及び直鎖アルコールと分枝脂肪酸との液状エステル油から選ばれた一種又は二種以上の液状エステル油、及び(C)ノニオン界面活性剤が配合し、使用前は透明であって、水で希釈すると濁りが生じる外観を有し、洗い流す態様で用いられる毛髪用処理剤。【選択図】図2