GAS PRODUCTION DEVICE, GAS PRODUCTION SYSTEM, AND GAS PRODUCTION METHOD

A gas production device and a gas production system capable of continuously and stably manufacturing a produced gas containing carbon monoxide from a raw material gas containing carbon dioxide are provided. A gas production device 1 manufactures a produced gas containing carbon monoxide by bringing a raw material gas containing carbon dioxide into contact with a reducing agent containing a metal oxide that reduces the carbon dioxide. The gas production device 1 includes a connecting portion 2 that supplies the raw material gas, a reducing gas supply section 3 that supplies a reducing gas for reducing the reducing agent oxidized by contact with the carbon dioxide, a reaction section 4 that includes a plurality of reactors 4a and 4b to which the connecting portion 2 and the reducing gas supply section 3 are respectively connected, and a reducing agent arranged in the reactors 4a and 4b, and that is capable of switching between the raw material gas and the reducing gas to be supplied to the respective reactors 4a and 4b, a gas merging section J4 that merges gases after passing through the reactors 4a and 4b to produce a mixed gas, an exhaust gas heating section 10 that heats the exhaust gas before being supplied to the reactors 4a and 4b, and a reducing gas heating section 11 that heats the reducing gas before being supplied to the reactors 4a and 4b.