A refrigerator comprising: a refrigerator main body including a cooling space; and a carbonated water production assembly provided in the refrigerator main body, wherein the carbonated water production assembly includes: a production module; a carbon dioxide supply module connected to the production module to supply carbon dioxide; a carbonated water container which is provided to be separable from the production module and in which carbonated water is produced; and a nozzle module which is provided to spray carbon dioxide into the carbonated water container and to be operated due to carbon dioxide which is supplied from the carbon dioxide supply module and flows into the production module, wherein the nozzle module includes: a nozzle pipe comprising a nozzle pipe flow path formed therein and a carbon dioxide supply nozzle formed at one end thereof to spray carbon dioxide into the carbonated water container, the nozzle pipe being movable in the production module in response to a first pressure of carbon dioxide; and a valve unit disposed at the other end of the nozzle pipe and movable with the nozzle pipe, the valve unit comprising an inlet hole and a valve portion provided, in response to a second pressure of carbon dioxide exceeding the first pressure, to open the inlet hole such that carbon dioxide flows into the nozzle pipe flow path. a refrigerator main body including a cooling space; and a carbonated water production assembly provided in the refrigerator main body, wherein the carbonated water production assembly includes: a production module; a carbon dioxide supply module connected to the production module to supply carbon dioxide; a carbonated water container which is provided to be separable from the production module and in which carbonated water is produced; and a nozzle module which is provided to spray carbon dioxide into the carbonated water container and to be operated due to carbon dioxide which is supplied from the carbon dioxide supply module and flows into the production module, a production module; a carbon dioxide supply module connected to the production module to supply carbon dioxide; a carbonated water container which is provided to be separable from the production module and in which carbonated water is produced; and a nozzle module which is provided to spray carbon dioxide into the carbonated water container and to be operated due to carbon dioxide which is supplied from the carbon dioxide supply module and flows into the production module, wherein the nozzle module includes: a nozzle pipe comprising a nozzle pipe flow path formed therein and a carbon dioxide supply nozzle formed at one end thereof to spray carbon dioxide into the carbonated water container, the nozzle pipe being movable in the production module in response to a first pressure of carbon dioxide; and a valve unit disposed at the other end of the nozzle pipe and movable with the nozzle pipe, the valve unit comprising an inlet hole and a valve portion provided, in response to a second pressure of carbon dioxide exceeding the first pressure, to open the inlet hole such that carbon dioxide flows into the nozzle pipe flow path. a nozzle pipe comprising a nozzle pipe flow path formed therein and a carbon dioxide supply nozzle formed at one end thereof to spray carbon dioxide into the carbonated water container, the nozzle pipe being movable in the production module in response to a first pressure of carbon dioxide; and a valve unit disposed at the other end of the nozzle pipe and movable with the nozzle pipe, the valve unit comprising an inlet hole and a valve portion provided, in response to a second pressure of carbon dioxide exceeding the first pressure, to open the inlet hole such that carbon dioxide flows into the nozzle pipe flow path.