< Topic >You suppress effectively specific high degree of sweet taste sweetener has, disagreeableness of bitterness, astringency and the harsh taste etc which pull the tail afterwards, without granting strange taste stench, kire and grant the impression clearly, you offer the taste improvement medicine which can improve in the natural sweet taste which is close to the sugar.Solutions4,7 toridekajienaru and/or the taste improvement medicine of the high degree of sweet taste sweetener which consists of 2,4,7 toridekatorienaru, is made to contain to the eating and drinking item which contains high degree of sweet taste sweetener.< Choice figure >It is not【課題】高甘味度甘味料が有する特有の、後に尾を引く苦味、渋味、えぐ味などの嫌味を、異味・異臭を付与することなく、効果的に抑制し、キレやすっきり感を付与し、砂糖に近い自然な甘味に改善することができる呈味改善剤を提供する。【解決手段】4,7-トリデカジエナールおよび/または2,4,7-トリデカトリエナールからなる高甘味度甘味料の呈味改善剤を、高甘味度甘味料を含有する飲食品に含有させる。【選択図】なし