PROBLEM TO BE SOLVED: To provide hair growth inhibitors which inhibit the growth of the hair and which is useful in depilation or epilation.SOLUTION: Provide is a hair growth inhibitor containing as active ingredients a plant selected from Euonymus atropurpureus and Asclepias syriaca, or an extract thereof.SELECTED DRAWING: None【課題】毛の成長を抑制し、除毛又は脱毛に有用な毛成長抑制剤の提供。【解決手段】イースタンワーフー及びオオトウワタから選ばれる植物又はその抽出物を有効成分とする毛成長抑制剤。【選択図】なし