The invention relates to a surfactant composition containing an alkyl ether sulfate represented by the following formula (1): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒRO - (PO) m (EO) n SO 3 M€ƒ€ƒ€ƒ€ƒ€ƒ(1) wherein R represents a linear alkyl group having 8 to 24 carbon atoms, PO and EO represent a propyleneoxy group and anethyleneoxygroup, respectively, m and n denote the average numbers of added moles of PO and EO, respectively, and are numbers meeting: 0 < m < 1 and 0 < n ‰¦ 2.3, respectively, and M represents a cation.
