PROBLEM TO BE SOLVED: To provide a taste improver for a sweetener having a high sweetness degree such as sucralose exhibiting effect of meliorating aftertaste feeling of sweetness: and to provide a taste-improving method for a sweetener having a high sweetness degree.SOLUTION: The taste improver for a sweetener having a high sweetness degree improves the taste of the sweetener having a high sweetness degree by adding davana oil to the sweetener having a high sweetness degree.COPYRIGHT: (C)2011,JPO&INPIT【課題】スクラロースなどの高甘味度甘味料の、甘味の後引き感の改善などの効果を奏する味質改善剤、及び味質改善方法を提供する。【解決手段】高甘味度甘味料に対して、ダバナオイルを添加することで、高甘味度甘味料の味質改善が図れる。【選択図】なし