PURPOSE:To increase the space for the working equipment between front and rear wheels, in a working vehicle whose body is provided with a wheel supporting member through a leaf spring for buffering, by arranging a differential mechanism input shaft upwards, and installing a motive power side rotating member on the input shaft through a rotation transmission shaft which can slide vertically. CONSTITUTION:A differential mechanism 18 for rear wheel is disposed at the center case portion 14a of a wheel supporting member 14, facing its input shaft 19 upwards. A belt pulley 24 which transmits power to the space to the downward output shaft of an engine (not shown here) through a transmission belt is positioned on an input shaft 19 and is installed on a vehicle body 17 with a bearing 25 and a pulley supporter 26 so that it may rotate around the shaft center in the vertical direction of a vehicle. Moreover, the input shaft 19 and the belt pulley 24 are connected to a rotation transmission shaft 32 through universal couplings 28, 29 so that it can slide vertically. It is thus possible to increase the space for working equipment between front and rear wheels.