PURPOSE: To perform heating cooking and cold storage or cold cooking in the same storage by changing a change valve on which a compressor unit is connected to send cold air in the neighborhood of an evaporator of an electronic oven, and cooling materials to be cooled in the storage.

CONSTITUTION: At the side in which a magnetron 1 is arranged in a storage 29 and at the contrary side thereof an evaporator chamber 30 in which an evaporator 21 is arranged is provided. The evaporator 21 is connected to a condenser 19 projected sideward from the evaporator chamber 30 and an outside compressor unit 41 connected to a capillary tube 20 through change valves 43, 44. A change over switch is pushed to transfer the change valves 43, 44 to the side of an electronic oven with a cold storage function. A fluorocarbon gas cooled in a cooling circuit of the electronic oven with the cold storage function is heat-exchanged with cold air returned through a cold return opening 23 and a cold return passage 37 from the inside of the storage 29 in a part of the evaporator 21. Thereby, even more cooled cold air is sent in the storage 29 from a cold air sending inlet 22 and successively circulated in the storage 29 to cool. Cooled materials B mounted on a turn table 9 are cooled.