To make the bucket-shaped structure of pores inconspicuous by preventing parakeratosis caused by stimulatory components in the sebum around the pores and maintaining the skin around the pores in the normal state.An oral preparation for improving pores which comprises one or more plants selected from the plants belonging to the genus of the Psophocarpus in the family of Leguminosae or an extract of the same本發明之課題在於提供一種抑制由毛穴周圍之皮脂中的刺激成分引起之角化不全,使毛穴周圍之皮膚保持正常,且抑制毛穴之研鉢狀結構粗大的經口毛穴改善劑。該經口毛穴改善劑係成為包含選自屬於豆科四棱豆(Psophocarpus)屬之植物中之1種或2種以上之植物或其萃取物者。