abstract: The aim of this work was to determine the influence of the amount of isolated soy protein, polysaccharide hydrocolloids, fiber and the kind of flavour agents on the quality of soy beverages. The addition of guar gum increased the stability of soy beverages in higher degree than the addition of locust bean gum. However, the sensory properties of beverages which contained the locust bean gum were evaluated higher. As far as physico-chemical and sensory properties are concerned the best evaluated sample among all investigated was the one which contained 3.48% isolated soy protein, 0.5% locust bean gum and 0.5% fiber. The kind of flavour agents had the influence on the sensory evalua-tion of beverages. The raspberry beverage possessed the highest consumer’s desirability among all investigated samples.