A refrigerator includes a storage space, an evaporator located inside of the storage space, a grille panel assembly that partitions the storage space to separate an evaporator space, a cryogenic freezing compartment that defines an insulation space within the storage space that maintains a temperature of the insulation space less than a temperature of the storage space, and a thermoelectric module assembly located at the grille panel and configured to supply cold air to the cryogenic freezing compartment. The thermoelectric module assembly includes a thermoelectric module having a heat absorption surface and a heat generation surface, a cold sink configured to contact the heat absorption surface and located in the cryogenic freezing compartment, a heat sink configured to contact the heat generation surface and located in the evaporator space, and an insulation frame that receives the thermoelectric module and that thermally insulates the cold sink from the heat sink.