Abstract: A drawstring fastener includes a female member, a male member movably fitted inside the female member, and an urging device urging the male member in a direction of protruding from the female member. An operating string is pulled out through a pass-through hole provided at a lower end of the female member. By a pulling force of the operating string, the male member can move in an inward entering direction in the female member against an urging force. The male member includes an inner space passing through the periphery, and a pass-through hole passing through the inner space and a lower end face, and disposed coaxially with the pass-through hole of the female member. A string upper end of the operating string is locked after passing pass-through holes of the female member and the male member and entering the inner space.