Engine device of working vehicle

An engine device of a combine harvester, wherein an engine is provided internally in a lower section of an inner portion of an engine room that is comprised of engine room frames erected behind a harvest storage tank on a travel machine, the engine device comprising

• a first case which removes particulate matter in the exhaust gas of the engine, and a second case which removes nitrogen oxide in the exhaust gas of the engine,
• wherein the first case is mounted on and affixed via a first case support body in a transverse orientation on a mounting table frame affixed on one of said engine room frames on one side of an upper portion of the engine room adjacent to a threshing device, and positioned apart from and above the engine,
• wherein the second case is affixed vertically via a second case support body to one of said engine room frames provided on a rear side of the engine room adjacent to the work device, and positioned lower than the first case,
• and wherein the second case is connected to the first case via a urea mixing pipe, a tail pipe is connected to the second case, the urea mixing pipe is positioned inside the engine room behind the first case and above the second case, and the urea mixing pipe has at least one bend thereby to change direction of gas exhaust gas flow therethrough.