Abstract: A heat-reserving container for pizza comprising a disc case having a flat circular portion, with a resin-made heat reservoir stored therein is disclosed. The entire surface, of the pizza can be in contact with the flat portion of the heat-reserving container. Also disclosed is a furnace for the above-mentioned heat-reserving container for pizza comprising heating plates each having an interval capable of storing the heat-reserving container for pizza to form multi-layered racks, each heating plate having a heater accommodated therein whose temperature is controlled individually, which can be securely inserted into the furnace body and is heat-reserved as well as the defective movement of the limit switch can be prevented.