PROBLEM TO BE SOLVED: To provide an athletes foot medicine for external use, which has extremely excellent antibacterial effect against Trichophyton which causes athletes foot, no side effect nor stimulus in treatment, and high safety.SOLUTION: The athletes foot medicine for external use contains capillin. Capillin exhibits excellent antibacterial effect against athletes foot caused by infection of fungus such as Trichophyton to the surface of a hand or foot, and the athletes foot medicine has no side effect and extremely high safety. Further, by combined use of fatty acid glyceride, especially fatty acid monoglyceride having a carbon number of 6 to 12, capillin as an active ingredient exhibits an excellent antibacterial effect even with a minute amount since capillin quickly penetrates into an affected area of skin, and the athletes medicine for external use has no side effect and has extremely high safety.COPYRIGHT: (C)2014,JPO&INPIT【課題】水虫を引き起こす白癬菌に極めて優れた抗菌作用を有し、副作用や治療時の刺激が無く、安全性の高い外用抗水虫剤を提供することを目的とする。【解決手段】本発明はカピリンを含有することを特徴とする外用抗水虫剤である。カピリンは白癬菌など真菌が手や足の表面等に感染して起きた水虫に対して優れた抗菌性を示し、尚かつ副作用がなく、安全性が極めて高い外用抗水虫剤を提供することが可能となる。更に脂肪酸グリセリド、特に炭素数が6~12の脂肪酸モノグリセリドを併用する事で有効成分カピリンが皮膚患部に迅速浸透してごく微量で優れた抗菌性を示し、尚かつ副作用がなく、安全性が極めて高い外用抗水虫剤を提供することが可能となる。【選択図】なし