PROBLEM TO BE SOLVED: To provide a weak acid cleansing agent that has excellent low temperature stability even at a pH of less than 6, and has a use feeling with good foaming and bubble texture.SOLUTION: The present invention provides a weak acid cleansing agent at a pH of less than 6, containing the following (A)-(D): (A) long-chain acyl neutral amino acid salt, (B) long-chain fatty acid amide propyl betaine, (C) polyoxyalkylene fatty acid alkanolamide, (D) etidronic acid and/or a salt thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】 ｐＨ６未満であっても、低温安定性が良好で、泡立ち、泡のキメが良好な使用感の弱酸性洗浄料を提供する。【解決手段】 下記の（Ａ）～（Ｄ）を含有するｐＨ６未満の弱酸性洗浄料。（Ａ）長鎖アシル中性アミノ酸塩（Ｂ）長鎖脂肪酸アミドプロピルベタイン（Ｃ）ポリオキシアルキレン脂肪酸アルカノールアミド（Ｄ）エチドロン酸及び/又はその塩【選択図】 なし
