PROBLEM TO BE SOLVED: To provide a washing agent composition which has excellent appearance stability after dilution, can be preferably used for a dry hair and has excellent foamability, washability and conditioning properties in a hair washing agent composition which is used by diluting with water.SOLUTION: There is provided a shampoo composition which comprises the following components (A) to (D) and is used by diluting with water in advance: (A) 14 to 30 mass% of a polyoxyethylene alkyl ether sulfate ester salt, (B) 1.2 to 6.0 mass% of an amino acid-based anionic surfactant, (C) 0.1 to 0.5 mass% of a cationized polymer compound and (D) 0.5 to 1.5 mass% of polyoxyethylene coconut oil fatty acid PEG-7 glyceryl.SELECTED DRAWING: None【課題】水で希釈して使用する毛髪洗浄剤組成物において、希釈後の外観安定性に優れ、乾いた髪に好ましく使用できる、起泡性、洗浄性、コンディショニング性に優れる洗浄剤組成物を提供する。【解決手段】下記成分(A)~(D)を含有し、あらかじめ水で希釈して使用することを特徴とするシャンプー組成物。(A)ポリオキシエチレンアルキルエーテル硫酸エステル塩 14~30質量%(B)アミノ酸系アニオン性界面活性剤 1.2~6.0質量%(C)カチオン化高分子化合物 0.1~0.5質量%(D)ポリオキシエチレンヤシ油脂肪酸PEG-7グリセリル 0.5~1.5質量%【選択図】なし