Provided is a packaged beverage subjected to heat sterilization, including the following components (A) and (B): (A) 2.5 mass % or more of a protein; and (B) non-polymer catechins, the packaged beverage having: a mass ratio between the component (A) and the component (B), [(B)/(A)], of from 0.02 to 0.1; a viscosity of from 15 to 35 mPa·s; and a pH of 6.3 or more.