The present invention relates to extruded soap bars having improved transparency. Specifically, by balancing the amounts of C.sub.16 (palmitic acid) and C.sub.18 (stearic acid) fatty acids to have a ratio in the final bar of 1, substantially improved transparency is unexpectedly obtained.

This invention provides a cleaning agent composition in which thermal deterioration is suppressed. The cleaning agent composition is a liquid cleaning agent composition comprising (a) fatty acid salts and (b) a sophorose lipid, wherein the fatty acid salts (a) comprise (a-1) at least one member selected from the group consisting of salts of C.sub.14-C.sub.22 saturated fatty acids and (a-2) at least one member selected from the group consisting of salts of C.sub.14-C.sub.22 unsaturated fatty acids, wherein A) the total amount of the component (a) is 2-35 mass % based on the cleaning agent composition taken as 100 mass %; B) the proportion of the component (a-2) is 20 parts by mass or more based on 100 parts by mass of the total amount of the component (a); and C) the proportion of the component (b) is 3 parts by mass or more per 100 parts by mass of the component (a-2).