Abstract: An apparatus for producing soybean flakes by cooking raw soybeans and squashing the cooked soybeans into flakes. Saturated steam from a boiler is passed through a superheater to form superheated steam and this superheated steam is led into a pressure cooker. The raw soybeans are cooked by superheated steam under pressure in the pressure cooker while they are carried on conveyors, and in the course of this cooking, the toxic substances contained in the raw soybeans are deactivated and also the smell of soybean is eliminated. The cooked soybeans are squashed into flakes by a roll mill and dried and cooled in a dryer/cooler unit.