To provide a superior exhaust and gas recirculation line which is relatively simple, incorporating only one heat exchanger, in particular.

An exhaust and gas recirculation line of an internal combustion engine for use in an automobile, in particular, is provided with a catalyst converter 2, recycling means 11 and 12 that recycle exhaust gas, and heat recovery means 7 and 8 that recover heat from the exhaust gas. The recycled exhaust gas is cooled and the automobile cabin is heated by recovering the heat energy from the exhaust gas. As well, a single heat exchanger 7 is provided which protects the catalyst converter 2 from the excessively high exhaust temperatures. A valve 5 that detours the exhaust gas, a back pressure valve 8 and an EGR valve 12 are controlled by an electronic control system 13. The exhaust gas recirculation line can be applied to direct injection gasoline or diesel engines, or lean mixed gasoline engines, in particular.