PROBLEM TO BE SOLVED: To provide a work vehicle in which an engine room (a bonnet) with an engine provided therein can be configured compactly, and assembly workability or maintenance workability of each case, whose outer shape is formed in a long cylindrical shape, can be improved.SOLUTION: A work vehicle comprises: a first case 28 for removing particulate substances in exhaust gas of an engine 1； and a second case 29 for removing nitrogen oxide substances in the exhaust gas of the engine 1. The engine 1 is mounted on a traveling machine frame in which left and right traveling wheels 53, 54 are disposed. In the work vehicle, the engine 1 and the first case 28 are provided inside a bonnet 56, and the first case 28 is supported on a top face side of the engine 1 in a laterally long posture. The second case 29 is disposed outside the bonnet 56. The second case 29 is supported on one side of the engine 1 in a vertically long posture.SELECTED DRAWING: Figure 5
