PROBLEM TO BE SOLVED: To provide a high-intensity sweetener-containing beverage and a method thereof, in more details, the high-intensity sweetener-containing beverage improved in the taste quality of a high-intensity sweetener, and the method thereof.SOLUTION: A high-intensity sweetener-containing beverage containing an acid taste imparting substance and a bitterness imparting substance is a beverage which is improved in the taste quality of a high-intensity sweetener, and in which the bitterness imparting substance is quassin and/or iso-α acid. The high-intensity sweetener-containing beverage improved in the taste quality of the beverage contains the high-intensity sweetener of a concentration having sweetness equal to that of sucrose of 0.5-15 wt.%, and has the acid-taste imparting substance with an acidity of 0.01-0.4%, and the quassin of 0.02 to less than 0.1 ppm. In the beverage, the high-intensity sweetener is a combination of acesulfame potassium and sucralose, and a weight ratio of the combination is preferably (1:120)-(1:3,000).SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】高甘味度甘味料含有飲料及びその製造方法に関し、詳細には、高甘味度甘味料の味質が改善された高甘味度甘味料含有飲料及びその製造方法の提供。【解決手段】酸味付与物質と苦味付与物質とを含んでなる、高甘味度甘味料含有飲料であって、高甘味度甘味料の味質が改善され、かつ、苦味付与物質が、クワシン及び/又はイソα酸である、飲料。ショ糖0.5~15重量%溶液と同等の甘味を有する濃度で高甘味度甘味料を含んでなり、酸味付与物質が酸度0.01~0.4%であり、クワシンが0.02~0.1ppm未満である飲料の味質が改善された高甘味度甘味料含有飲料。高甘味度甘味料がアセスルファムカリウムとスクラロースの組み合わせであり、好ましくはその組み合わせの重量比が1:120~1:3000である、飲料。【選択図】なし