TRANSMISSION STRUCTURE FOR WORKING VEHICLE

PURPOSE:To improve the strength of a reversing shaft by forming a case wall for supporting the reversing shaft in proximity to a meshed part with a PTO output shaft in the reversing shaft so as to minimize bending moment acting upon the reversing shaft. CONSTITUTION:The supporting wall 16, bearing-supporting a reversing shaft 7, of a case 9 is formed in proximity to a bevel gear meshed part 18 with a PTO output shaft 10 in the reversing shaft 7 so as to reduce bending moment acting upon the reversing shaft 7 so as to reduce bending moment acting upon the reversing shaft 7 due to PTO work load to a minimum. In other words, the spaced distance between the bearing-supporting part and the meshed part 18 is shortened by the case wall 16 getting closer to the meshed part 18, and therefore bending moment acting upon the reversing shaft 7 becomes small. Accordingly, even without changing the absolute strength of the reversing shaft 7 itself, the strength of the reversing shaft 7 is improved substantially and can be made lightweight.