Abstract: A belt conveyor device for transporting cold foods capable of controlling the quality and sanitation of foods, without requiring the necessity of cooling a whole processing room and without being affected by an environmental temperature, by forming cooling spaces only in the food transporting spaces of a conveyor for processing and transporting cold foods. Wherein cold air outlets and cold air suction ports are provided on the right and left sides of the transporting spaces of the belt conveyor opposedly to each other across the belt conveyor, cooling parts are provided in spaces sandwiched between the upper and lower sides of the running belt, food transporting spaces on the surfaces of the belt conveyor in a working space are formed, by a cool air flow from the cold air outlets to the cold air suction ports, into the cooled spaces having temperatures equivalent to a food refrigerating temperature of approx. 10-C.