It is intended to provide biodegradable low−foaming detergent compositions which sustain favorable detergency over a wide temperature range. Thus, biodegradable low−foaming detergent compositions containing sophorolipids are provided. The sophorolipids comprise at least 35% of sophorolipid (lactone type), preferably sophorolipid (lactone type) and sophorolipid (acid type) at a ratio of from 35:65 to 90:10. These low−foaming detergent compositions may further contain auxiliary detergent components which are selected from the group consisting of enzymes, oxygen−type bleaching agents, bleaching activators, alkali agents, water softeners (Ca scavengers), fluidity improving agents and neutral inorganic salts.
