An object of the invention is to provide an engine device of a working vehicle structured such that a first case (62) and a second case (229) can be firmly fixed with a high rigidity by making good use of a frame (91) of an engine room (92). In the engine device of the working vehicle having the first case (62) which removes particulate matter in exhaust gas of the engine (14) and the second case (229) which removes nitrogen oxide in the exhaust gas of the engine (14), the first case (62) is provided in the engine room (92) which is inward provided with the engine (14), via a first case support body (211), and the second case (229) is provided in the engine room (92) via second case support bodies (230, 231).
