Provided is a surfactant composition having excellent fluidity after long-term storage at a low temperature (5°C) and excellent foamability when diluted.The surfactant composition containing the following components (A), (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): R1O-(PO)m(EO)nSO3M (1),wherein R1 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, andindependently 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): R2O-(AO)t-R3 (2),wherein R2 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 R3 represents a hydrogen atom or a methyl group and(B-2) a monoalkyl or monoalkenyl glyceryl ether and(C) a water-soluble salt.
