Provided is a packaged Oolong-tea beverage which contains an Oolong tea extract having a tannin/Brix ratio of from 200 to 265 (mg/100 mL/wt. %) and has a non-polymer catechin content of from 0.06 to 0.5 wt. %.The packaged Oolong-tea beverage of the present invention contains a high concentration of catechins and at the same time, tastes good without losing the original taste of Oolong tea.