An acid milk beverage that without the use of conventionally employed variousthickening stabilizers, excels in product quality stability, and that realizesgood flavor and calorie suppression, being of light type; and a process forproducing the same. There is provided an acid milk beverage characterized inthat there are contained polydextrose and at least one glucide selected fromthe group (a) consisting of glucose, fructose, sugar, trehalose, maltose,erythritol, sorbitol, xylitol, maltitol, lactitol, palatinose andgalactooligosaccaride, and that the sum of these soluble solid contents is inthe range of 12.0 to 17.0 mass%, containing substantially none of thickeningstabilizers. Further, there is provided a process for producing the acid milkbeverage.