A travel vehicle including a travel vehicle engine device mounted on a travel machine body, and a hood, the travel vehicle engine device being covered with the hood, the travel vehicle engine device comprising an air cleaner for supplying air to an engine, wherein the air cleaner is arranged above an intake manifold on one side of an upper surface of the engine, characterized in that: the travel vehicle engine device further comprises a gas cleaning filter for cleaning exhaust gas from the engine, the gas cleaning filter being formed in the shape of a long cylinder along an engine output shaft, and the gas cleaning filter is arranged above an exhaust manifold on the other side of the upper surface of the engine, wherein the gas cleaning filter is arranged at an offset position closer to a center in a left and right width of the engine than the air cleaner, wherein a clearance between an inner surface of the hood and the gas cleaning filter is larger than a clearance between the air cleaner and the gas cleaning filter, and wherein a clearance between the inner surface of the hood 8106) and the gas cleaning filter is made larger than a clearance between the inner surface of the hood and the air cleaner wherein a hood opening/closing pivot shaft is arranged inside a rear portion of the hood, and a front portion of the hood is movable upward around the hood opening/closing pivot shaft to open a front side and an upper side of the engine wherein a gas spring is coupled to a hood side hinge which is fixed to the lower surface of the hood, and to the hood opening/closing pivot shaft set on the travel machine body side, wherein the hood is coupled to the travel machine body side by the gas spring in such a way as to turn, the hood being supportable in a turned position by the strutting action of the gas spring, the gas spring extending in a front and rear direction by the use of the clearance between the gas cleaning filter and the hood. the travel vehicle engine device further comprises a gas cleaning filter for cleaning exhaust gas from the engine, the gas cleaning filter being formed in the shape of a long cylinder along an engine output shaft, and the gas cleaning filter is arranged above an exhaust manifold on the other side of the upper surface of the engine, wherein the gas cleaning filter is arranged at an offset position closer to a center in a left and right width of the engine than the air cleaner, wherein a clearance between an inner surface of the hood and the gas cleaning filter is larger than a clearance between the air cleaner and the gas cleaning filter, and wherein a clearance between the inner surface of the hood 8106) and the gas cleaning filter is made larger than a clearance between the inner surface of the hood and the air cleaner wherein a hood opening/closing pivot shaft is arranged inside a rear portion of the hood, and a front portion of the hood is movable upward around the hood opening/closing pivot shaft to open a front side and an upper side of the engine wherein a gas spring is coupled to a hood side hinge which is fixed to the lower surface of the hood, and to the hood opening/closing pivot shaft set on the travel machine body side, wherein the hood is coupled to the travel machine body side by the gas spring in such a way as to turn, the hood being supportable in a turned position by the strutting action of the gas spring, the gas spring extending in a front and rear direction by the use of the clearance between the gas cleaning filter and the hood.