To provide a regenerative exhaust gas processing unit capable of collecting thermal energy from an exhaust gas more efficiently and collecting the thermal energy corresponding to the variation of the concentration or the contents of the exhaust gas if the concentration or the contents of the exhaust gas change.

Each of regenerative exhaust gas processing units is provided with a thermal storage body 31, at least two compartments or more of thermal storage chambers 3, gas feeding valves 4 for feeding the exhaust gas to each of the thermal storage chambers 3, exhaust valves 4 for exhausting the exhaust gas from each of the thermal storage chambers 3, combustion chambers 2 communicating with the thermal storage chambers 3 for combusting the exhaust gas, a bypass duct 8 communicating with the combustion chambers 2, a heat exchanger 82 communicating with the bypass duct 8 and a regulating valve 81 for feeding the exhaust gas from the combustion chambers 2 to the heat exchanger 82, wherein the heat is collected by introducing the exhaust gas inside the combustion chambers 2 from the bypass duct 8 to the heart exchanger 82.