PROBLEM TO BE SOLVED: To provide a substance which suppresses isovaleric acid odor. SOLUTION: An isovaleric acid odor inhibitor containing at least one selected from the group consisting of acetylcedrene, γ-methylionone and galaxolide as an active ingredient. [Selection diagram] None【課題】イソ吉草酸臭を抑制する物質の提供。【解決手段】アセチルセドレン、γ-メチルイオノン及びガラクソリドからなる群より選択される少なくとも1種を有効成分とする、イソ吉草酸臭抑制剤。【選択図】なし