PROBLEM TO BE SOLVED: To provide a beverage with reduced sourness of manno-oligosaccharides.SOLUTION: An acidic beverage contains the following components (A)-(C): (A) manno-oligosaccharides of 0.4-2 mass%, (B) malt extracts of 0.1-4.3 mass% in terms of solid content, and (C) carbon dioxide, and the acidic beverage has a pH of 3-4.