Provided is an engine device of a working vehicle structured such that a first case and a second case can be firmly fixed with a high rigidly by sharing supporting loads of the first case and the second case by an engine room and a working portion. In the engine device of the working vehicle having the first case which removes particulate matter in exhaust gas of an engine, and the second case which removes nitrogen oxide in the exhaust gas of the engine, the first case is provided in an outer side of the engine room which is inward provided with the engine via a first case support body, and the second case is provided in the working portion which is adjacent to the engine room via a second case support body.
