The cleansing composition comprises an alkyl ether carboxylic acid or salt thereof wherein the alkyl ether carboxylic acid or salt thereof is represented by the general formula (1) (in the formula, R1 represents a C4-22 alkyl group, n represents a number 0-20, and M represents a hydrogen atom, alkali metal, alkaline earth metal, ammonium or organic ammonium)； R1 contains two or more alkyl groups； the mean number of carbons of R1 is 10.8 to 12.5； and 8 to 27 mass% of n=0 components, 28 to 38 mass% total of n=1 components and n=2 components, and 10 mass% or more total of n=6 components are contained.本發明係關於一種清潔劑組合物，其含有烷基醚羧酸或其鹽，該烷基醚羧酸或其鹽係以下通式(1)表示：[化1]R1-O-(CH2CH2O)n-CH2-COOM (1)(式中，R1表示碳數4~22之烷基，n表示0~20之數，M表示氫原子、鹼金屬、鹼土金屬、銨或有機銨)，且R1含有2種以上之烷基，R1之平均碳數為10.8~12.5，並且包含8~27質量%之n=0之成分，合計28~38質量%之n=1之成分與n=2之成分，合計10質量%以上之n≧6之成分。
