An engine device including: an exhaust manifold and an intake manifold, the exhaust manifold being disposed on one of left and right sides of a cylinder head, the intake manifold being disposed on the other of the left and right sides of the cylinder head; and a turbocharger that uses fluid energy of an exhaust gas discharged from the exhaust manifold, to compress fresh air to be flowed into the intake manifold, the turbocharger being constituted by a two-stage turbocharger including a high-pressure turbocharger coupled to the exhaust manifold and a low-pressure turbocharger coupled to the high-pressure turbocharger, the high-pressure turbocharger being disposed on one of left and right lateral sides of the exhaust manifold, the low-pressure turbocharger being disposed above the exhaust manifold, the high-pressure turbocharger including a high-pressure turbine and a high-pressure compressor, the high-pressure turbine being in communication with an exhaust gas outlet of the exhaust manifold, the high-pressure compressor being configured to supply compressed air to the intake manifold, the low-pressure turbocharger including a low-pressure turbine and a low-pressure compressor, the low-pressure turbine having an exhaust gas inlet that is in communication with the exhaust gas outlet of the high-pressure turbine through an exhaust relay pipe, the low-pressure compressor having a fresh air outlet that is in communication with a fresh air inlet of the high-pressure compressor through a fresh air relay pipe, the high-pressure compressor being disposed on one of front and rear sides relative to the high-pressure turbine, the low-pressure turbine being disposed on the other of the front and rear sides relative to the low-pressure compressor, the high-pressure compressor having the fresh air inlet that is opened toward one of front and rear sides, the low-pressure compressor having a fresh air inlet that is opened toward one of front and rear sides, one end of the fresh air relay pipe having a U-shape being fixed to the fresh air inlet of the high-pressure compressor, the other end of the fresh air relay pipe being coupled to the fresh air outlet of the low-pressure compressor, characterized in that the low-pressure compressor is disposed above the high-pressure turbine and has the fresh air outlet that protrudes from one of left and right lateral sides and then is directed toward one of front and rear sides, wherein the high-pressure compressor has a fresh air outlet that is opened downward, the fresh air inlet and the fresh air outlet of the low-pressure compressor being disposed toward the same direction. an exhaust manifold and an intake manifold, the exhaust manifold being disposed on one of left and right sides of a cylinder head, the intake manifold being disposed on the other of the left and right sides of the cylinder head; and a turbocharger that uses fluid energy of an exhaust gas discharged from the exhaust manifold, to compress fresh air to be flowed into the intake manifold, the turbocharger being constituted by a two-stage turbocharger including a high-pressure turbocharger coupled to the exhaust manifold and a low-pressure turbocharger coupled to the high-pressure turbocharger, the high-pressure turbocharger being disposed on one of left and right lateral sides of the exhaust manifold, the low-pressure turbocharger being disposed above the exhaust manifold, the high-pressure turbocharger including a high-pressure turbine and a high-pressure compressor, the high-pressure turbine being in communication with an exhaust gas outlet of the exhaust manifold, the high-pressure compressor being configured to supply compressed air to the intake manifold, the low-pressure turbocharger including a low-pressure turbine and a low-pressure compressor, the low-pressure turbine having an exhaust gas inlet that is in communication with the exhaust gas outlet of the high-pressure turbine through an exhaust relay pipe, the low-pressure compressor having a fresh air outlet that is in communication with a fresh air inlet of the high-pressure compressor through a fresh air relay pipe, the high-pressure compressor being disposed on one of front and rear sides relative to the high-pressure turbine, the low-pressure turbine being disposed on the other of the front and rear sides relative to the low-pressure compressor, the high-pressure compressor having the fresh air inlet that is opened toward one of front and rear sides, the low-pressure compressor having a fresh air inlet that is opened toward one of front and rear sides, one end of the fresh air relay pipe having a U-shape being fixed to the fresh air inlet of the high-pressure compressor, the other end of the fresh air relay pipe being coupled to the fresh air outlet of the low-pressure compressor, characterized in that the low-pressure compressor is disposed above the high-pressure turbine and has the fresh air outlet that protrudes from one of left and right lateral sides and then is directed toward one of front and rear sides, wherein the high-pressure compressor has a fresh air outlet that is opened downward, the fresh air inlet and the fresh air outlet of the low-pressure compressor being disposed toward the same direction.