To provide a novel component having a stain adhesion suppression effect.SOLUTION: There is provided a tooth stain adhesion inhibitor formed of at least one kind of vegetable oil, a total sum of product of an iodine value of the at least one kind of vegetable oil and a content (mass%) is equal to or less than 18050, preferably, in the tooth stain adhesion inhibitor, the vegetable oil having an iodine value equal to or more than 65 and equal to or less than 190, is included as a main component, and the vegetable oil having an iodine number of less than 65 is included as an accessory component, preferably.SELECTED DRAWING: None【課題】本発明は、ステイン付着抑制効果を有する新たな成分を提供することを目的とする。【解決手段】少なくとも１種の植物油からなる、歯のステイン付着抑制剤。少なくとも１種の植物油のヨウ素価と含有量（重量％）との積の総和は１８０５０以下であることが好ましく、ヨウ素価が６５以上１９０以下の植物油を主成分として含み、ヨウ素価が６５未満の植物油を副成分として含むことが好ましい。【選択図】なし
