An object of the invention is to provide an engine device of a working vehicle structured such that a first case (75) and a second case (229) can be firmly fixed with a high rigidly by sharing supporting loads of the first case (75) and the second case (229) by an engine room (97) and a working portion (5). In the engine device of the working vehicle having the first case (75) which removes particulate matter in exhaust gas of an engine (14), and the second case (229) which removes nitrogen oxide in the exhaust gas of the engine (14), the first case (75) is provided in an outer side of the engine room (97) which is inward provided with the engine (14) via a first case support body, and the second case (229) is provided in the working portion (5) which is adjacent to the engine room (97) via a second case support body (230, 231).
