<;P>;PROBLEM TO BE SOLVED: To obtain a cosmetic composition which can be easily used for both emulsion- and non-emulsion cosmetics and is excellent in antiseptic and antibacterial properties, to provide a production method therefor and a method for reducing the amounts of antiseptic and antibacterial agents by improving antiseptic and antibacterial effects of the cosmetic composition having a polyorganosiloxane-containing &epsi;-polylysine. <;P>;SOLUTION: The cosmetic composition contains at least one selected from the polyorganosiloxane-containing &epsi;-polylysine compound and a physiologically acceptable salt thereof and a polyhydric alcohol, wherein the polyorganosiloxane-containing &epsi;-polylysine compound is obtained by reacting &epsi;-polylysine with a polyorganosiloxane. <;P>;COPYRIGHT: (C)2006,JPO&NCIPI