PROBLEM TO BE SOLVED: To provide an external preparation for skins, which has an excellent antimicrobial/antiseptic force even in an emulsion preparation and contains an antimicrobial/antiseptic agent little irritating the skins, and to provide an antimicrobial/antiseptic method for an external preparation for skins.SOLUTION: This external preparation for skins, having high safety and excellent antimicrobial/antiseptic effect, is characterized by containing a 2,2-bis(hydroxymethyl)alkylcarboxylate having a specific structure and having excellent antimicrobial/antiseptic effect.COPYRIGHT: (C)2007,JPO&INPIT【課題】乳化製剤中でも優れた抗菌・防腐力を有し、しかも皮膚刺激の少ない抗菌・防腐剤を含有する皮膚外用剤および皮膚外用剤用の抗菌・防腐方法の提供。【解決手段】 優れた抗菌・防腐効果を有する特定構造の2,2-ビス(ヒドロキシメチル)アルキルカルボン酸エステルを配合することにより安全性が高く、抗菌・防腐効果に優れた皮膚外用剤が得られる。【選択図】なし