It is an object of the present invention to provide an engine supporting structure for a working vehicle that can realize the simplification of manufacturing processes and the reduction of costs. With respect to an engine supporting structure for a working vehicle (backhoe) that includes an engine and a plurality of engine mounts to support the engine, the engine supporting structure includes one piece of mount plate to support the plurality of engine mounts, wherein the mount plate is supported by a stand having a skin-stressed sheet-metal body construction, surrounding with beams welded to the left and right end portions of the mount plate, and with beams welded to the anterior and posterior end portions of the mount plate.