This invention provides a cleaning agent composition that exhibits good storage stability, especially storage stability at low temperature, and a cleaning agent composition that can be favorably dispensed from a dispenser. The cleaning agent composition of the present invention comprises (a) a fatty acid salt and (b) a sophorose lipid, wherein the proportion of the component (a) is 4 to 18 mass% based on the cleaning agent composition taken as 100 mass%； the proportion of a fatty acid salt having 12 or fewer carbon atoms is 15 parts by mass or more, and the proportion of a fatty acid salt having 16 or more carbon atoms is 60 parts by mass or less, based on 100 parts by mass of the total amount of the component (a)； the proportion of an acidic sophorose lipid is 80 mass% or more based on the total amount of the component (b) taken as 100 mass%； and the proportion of the component (b) is 5 to 80 parts by mass per 100 parts by mass of the total amount of the component (a).
