Combine harvester

Provided is a combine harvester capable of effectively and flexibly using the space of a machine body, capable of compactly installing an exhaust gas purification device, and capable of obtaining good maintainability for easily accessing and processing the exhaust gas purification device and a heat exchanger. A combine harvester in which an engine (11) is disposed at the front part of a traveling machine body (4) is provided with an exhaust gas purification device (30) having a DPF housing (31) for removing particulate matter from the exhaust gas of the engine (11) and an SCR housing (32) for removing nitrogen oxides from the exhaust gas of the engine (11); and an intercooler (200) that is disposed on the outside of the harvester with respect to the exhaust gas purification device (30) and that cools air supplied to the engine (11), the exhaust gas purification device (30) and the intercooler (200) being disposed behind a driving unit disposed above the engine (11) so as to face each other with a space thereb