PROBLEM TO BE SOLVED: To provide a heat sterilized packed beverage containing high concentration of proteins, having a smooth palate feeling and a good feeling to the throat even having a certain degree of viscosity.SOLUTION: There is provided a heat sterilized packed beverage containing following components (A) and (B) (A) proteins: 2.5 mass% or more and (B) non-polymer catechins, having the mass ratio of the component (A) and the component (B) [(B)/(A)] of 0.02 to 0.1, viscosity of 15 to 35 mPa s, and pH of 6.3 or more.COPYRIGHT: (C)2015,JPO&INPIT【課題】高濃度のたんぱく質を含有し、ある程度の粘度を有するにも拘らず、口当たりが滑らかで、かつ喉越しの良好な加熱殺菌された容器詰飲料を提供すること。【解決手段】次の成分(A)及び(B);(A)たんぱく質:2.5質量%以上、及び(B)非重合体カテキン類を含有し、成分(A)と成分(B)との質量比[(B)/(A)]が0.02~0.1であり、粘度が15~35mPa・sであり、かつpHが6.3以上である、加熱殺菌された容器詰飲料。【選択図】なし