It is an object to provide an engine device in which an engine 3 and an exhaust gas purification device 47 can be internally installed in a machine casing 2 such as a stationary power generation work machine 70 in a compact way while the maintenance workability on the upper surface side of the engine 3 can be improved. The engine device of the present invention of the instant application includes a first case 48 for removing particulate matter in the exhaust gas of the engine 3 and a second case 49 for removing nitride oxides in the exhaust gas of the engine 3. The second case 49 is connected to the first case 48 via a urea mixing pipe 59. A supporting stand 65 with which the first case 48, the second case 49, and the urea mixing pipe 59 are adhered in parallel is provided. The first case 48, the second case 49, and the urea mixing pipe 59 are integrally arranged on the supporting stand 65, thereby forming the exhaust gas purification device 47 having single component structure, and the exhaust gas purification device 47 is mounted on supporting leg bodies 66 provided on the engine 3.
