Provided is a packaged beverage containing isoquercitrin and a sugar adduct thereof, said beverage not changing color easily even if stored for a long period. This packaged beverage contains the following components (A) and (B): (A) 0.03 to 0.17 mass% of isoquercitrin and sugar adduct thereof and (B) 0.01 to 3 mass% of sugar alcohol and/or trehalose (B). The mass ratio [(B)/(A)] of component (B) to component (A) is 3 to 50, and the pH is 2 to 5.
