A refrigerator comprising: a door configured to open and close a storage chamber of the refrigerator; a thermoelectric element module configured to cool the storage chamber; a defrosting temperature sensor installed in the thermoelectric element module and configured to detect a temperature of the thermoelectric element module; and a controller configured to control an output of the thermoelectric element module, wherein the thermoelectric element module comprises: a thermoelectric element comprising a heat absorption portion and a heat dissipation portion, a first heat sink that is in contact with the heat absorption portion and that is configured to exchange heat with an inside of the storage chamber, a first fan that faces the first heat sink and that is configured to generate air flow to accelerate heat exchange of the first heat sink, a second heat sink that is in contact with the heat dissipation portion and that is configured to exchange heat with an outside of the storage chamber, and a second fan that faces the second heat sink and that is configured to generate air flow to accelerate heat exchange of the second heat sink, wherein the controller is configured to: initiate a natural defrosting operation for removing frost deposited on the thermoelectric element module at every preset period determined based on an driving integration time of the thermoelectric element module, and terminate the natural defrosting operation when the temperature of the thermoelectric element module measured by the defrosting temperature sensor reaches a reference defrosting termination temperature, and wherein the controller is configured to, based on initiating the natural defrosting operation, (i) stop operation of the thermoelectric element, (ii) maintain rotation of the first fan, and (iii) stop rotation of the second fan for a preset time and then rotate the second fan after a lapse of the preset time. a door configured to open and close a storage chamber of the refrigerator; a thermoelectric element module configured to cool the storage chamber; a defrosting temperature sensor installed in the thermoelectric element module and configured to detect a temperature of the thermoelectric element module; and a controller configured to control an output of the thermoelectric element module, wherein the thermoelectric element module comprises: a thermoelectric element comprising a heat absorption portion and a heat dissipation portion, a first heat sink that is in contact with the heat absorption portion and that is configured to exchange heat with an inside of the storage chamber, a first fan that faces the first heat sink and that is configured to generate air flow to accelerate heat exchange of the first heat sink, a second heat sink that is in contact with the heat dissipation portion and that is configured to exchange heat with an outside of the storage chamber, and a second fan that faces the second heat sink and that is configured to generate air flow to accelerate heat exchange of the second heat sink, a thermoelectric element comprising a heat absorption portion and a heat dissipation portion, a first heat sink that is in contact with the heat absorption portion and that is configured to exchange heat with an inside of the storage chamber, a first fan that faces the first heat sink and that is configured to generate air flow to accelerate heat exchange of the first heat sink, a second heat sink that is in contact with the heat dissipation portion and that is configured to exchange heat with an outside of the storage chamber, and a second fan that faces the second heat sink and that is configured to generate air flow to accelerate heat exchange of the second heat sink, wherein the controller is configured to: initiate a natural defrosting operation for removing frost deposited on the thermoelectric element module at every preset period determined based on an driving integration time of the thermoelectric element module, and terminate the natural defrosting operation when the temperature of the thermoelectric element module measured by the defrosting temperature sensor reaches a reference defrosting termination temperature, and initiate a natural defrosting operation for removing frost deposited on the thermoelectric element module at every preset period determined based on an driving integration time of the thermoelectric element module, and terminate the natural defrosting operation when the temperature of the thermoelectric element module measured by the defrosting temperature sensor reaches a reference defrosting termination temperature, and wherein the controller is configured to, based on initiating the natural defrosting operation, (i) stop operation of the thermoelectric element, (ii) maintain rotation of the first fan, and (iii) stop rotation of the second fan for a preset time and then rotate the second fan after a lapse of the preset time.