An aim is to provide a refreshing acidic milk beverage in which precipitation or aggregation is not produced and whey syneresis is reduced even in an acidic milk beverage having a low solids-not-fat concentration, and provided is an acidic milk beverage characterized by comprising an acidic milk beverage base and pectin having an intrinsic viscosity of 5.9 to 8.5, an esterification degree of 74 to 80 and a calcium reactivity of 230 or less.