PROBLEM TO BE SOLVED: To provide a percutaneous absorption promoter in which the percutaneous absorption of a therapeutic ingredient is improved without damaging safety and sense of use.SOLUTION: The percutaneous absorption promoter includes the following (A)-(C) as active ingredients. (A): α-monoglyceryl ether shown by general formula (1) (in the formula, R denotes a 8-36C alkyl group or alkenyl group), (B): ethanol and (C): a nonionic surfactant.COPYRIGHT: (C)2013,JPO&INPIT【課題】 安全性や使用感を損ねることなく薬効成分の経皮吸収性を向上させる、経皮吸収促進剤の提供。【解決手段】 次の(A)~(C)を有効成分とする経皮吸収促進剤。(A)一般式(1):【化1】〔式中、Rは炭素数8~36のアルキル基又はアルケニル基を示す。〕で表されるα‐モノグリセリルエーテル(B)エタノール(C)ノニオン性界面活性剤【選択図】なし