Provided is a surfactant composition having excellent fluidity after long-term storage at a low temperature (5C) and excellent foamability when diluted. The surfactant composition containing the following components (A) and (B) and (C), wherein the content of the component (A) is 40 to 75 wt.%, (A) a sulfate surfactant represented by the following general formula (1): R 1 O- (PO) m (EO) n SO 3 M (1), wherein R 1 represents a hydrocarbon group having 8 to 18 carbon atoms PO represents a propyleneoxy group EO represents an ethyleneoxy group m and n represent an average mole number of added PO and EO, respectively, are the same as or different from each other and independently represent a number within the ranges of 0 < m < 1 and 0 < n < 5 and M represents a cation (B) one or more of compound (s) selected from the group consisting of the following (B-1) and (B-2): (B-1) an alkylene oxide adduct of alcohol represented by the following general formula (2): R 2 O- (AO) t - R 3 (2), wherein R 2 represents an alkyl or alkenyl group having 8 to 10 carbon atoms AO represents an alkyleneoxy group having 2 to 4 carbon atoms t represents an average mole number of added AO and represents a number of 0.5 to 4.0 and R 3 represents a hydrogen atom or a methyl group and (B-2) a monoalkyl or monoalkenyl glyceryl ether and (C) a water-soluble salt.
