A work vehicle limited in a mounting space is adapted to have an engine, which is provided with an exhaust gas cleaning device, easily arranged therein. An engine device, which is to be mounted on the work vehicle, is provided with the engine mounted on a machine body and covered with a hood, an air cleaner for cleaning air introduced into the engine, and an exhaust gas cleaning device for cleaning exhaust gas from the engine. The exhaust gas cleaning device is arranged on a flywheel housing fitted on one side portion of the engine.