To provide a refreshing drink having a light drinking mouth, improving the function of dispersing and stabilizing proteins with respect to low viscosity acidic protein beverages, as compared with conventional drinks.SOLUTION: By adding a water-soluble soybean polysaccharide and gum arabic, it is possible to provide an acidic protein beverage having a low viscosity and having superior dispersion stability, in which protein aggregation and precipitation are predominantly suppressed as compared with the prior art it can.Selection drawing None【課題】低粘度の酸性蛋白質飲料について、従来よりも蛋白質を分散・安定化させる機能を向上し、飲み口の軽い、すっきりとした飲料を提供することを課題とする。【解決手段】水溶性大豆多糖類及びアラビアガムを添加することで、低粘度で、従来よりも蛋白質の凝集や沈殿が優位に抑制された分散安定性の良好な酸性蛋白質飲料を提供することができる。【選択図】なし