Abstract: Reduced-size granulation chamber for extruders of materials such as plastics, constituted by a rotating drum wherein the cooling water remains adherent to the walls due to the centrifugal force and which has openings for the exit of the water and of the granules and is inserted in a basket which is in turn inserted in a container, both being fixed and separating the water from the granules, the granules being thrust by inclined fins arranged outside the drum in the chamber defined between the drum and the basket while the water falls by gravity into the second chamber defined between the basket and the fixed chamber.