PROBLEM TO BE SOLVED: To provide a novel agent for preventing or improving seborrheic keratosis that can remove even a wart that has already been formed.SOLUTION: An agent for preventing or improving seborrheic keratosis contains carotenoid, particularly fucoxanthin or lutein or a derivative thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2019,JPO&INPIT【課題】既に形成された疣をも解消し得る新規な脂漏性角化症の予防又は改善剤を提供すること。【解決手段】カロテノイド、特にフコキサンチンもしくはルテイン又はその誘導体を含有してなる、脂漏性角化症の予防又は改善剤。【選択図】なし