PROBLEM TO BE SOLVED: To provide a new technology that can suppress water separation occurring during the melting of frozen portion even for the case of increased sodium content for the purpose of salinity supplementation in an acidic milky beverage containing milk and soybean polysaccharide and in which at least a part of the beverage is frozen and a part or all of the frozen part is melted and taken in.SOLUTION: Provided is an acidic milky beverage containing milk and soybean polysaccharide and in which at least a part thereof is frozen and a part or all of the frozen portion is melted and taken in, and in which non-fat milk solid content: 0.1 to 1.0 mass%, sugar content: 0.5 to 1.7, pH: 3.6 to 4.2, and sodium content: 20 to 90 mg/100 ml.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】乳および大豆多糖類を含有し、且つ飲料の少なくとも一部が凍結しており、当該凍結部分の一部又は全部を融解して摂取する酸性乳性飲料において、塩分補給のためナトリウムの含有量が高められている場合にも凍結部分が融解したときに生じる離水を抑制できる新規な技術を提供する。【解決手段】 乳および大豆多糖類を含有し、且つその少なくとも一部が凍結しており、当該凍結部分の一部又は全部を融解して摂取する酸性乳性飲料であって、無脂乳固形分量:0.1~1.0質量%、糖度:0.5~1.7、pH:3.6~4.2およびナトリウム含有量:20~90mg/ 100mlである酸性乳性飲料。【選択図】 なし