PROBLEM TO BE SOLVED: To provide an antifugal agent, a dandruff inhibitor or the like which has antimicrobial activity (antifugal activity) to malassezia bacteria as the pathogenicity of dandruff or the like, and further has high safety to the skin.SOLUTION: The antifugal agent to malassezia bacteria comprises a fatty acid derivative represented by general formula (1) (wherein, X denotes a 2 to 14C alkyl group and Y denotes a 1 to 11C alkylene group) or its salt as an active constituent.COPYRIGHT: (C)2012,JPO&INPIT【課題】フケ等の原因菌であるマラセチア属菌に対して抗菌活性(抗真菌活性)を有し、しかも皮膚に対して安全性の高い、抗真菌剤、フケ抑制剤等の提供。【解決手段】下記の一般式(1):〔式中、Xは炭素数2~14のアルキル基を示し、Yは炭素数1~11のアルキレン基を示す。〕で表される脂肪酸誘導体又はその塩を有効成分とするマラセチア属菌に対する抗真菌剤。【選択図】なし