DRIVE-TYPE CONTROL DEVICE FOR WORK VEHICLE

In a working vehicle 141, it is possible to achieve a downsizing of an engine 70 by securing an output torque in a low rotating region of the engine 70 without using any supercharger. In the working vehicle 141 having the engine 70 mounted to a travel machine body 142, a common rail type fuel injection device 117 which injects fuel to the engine 70, and a continuously variable transmission 159 which shifts power from the engine 70, a rotating speed N of the engine 70 is limited to two kinds, N#1 and N#2. Further, a change gear ratio of the continuously variable transmission 159 is changed and regulated in such a manner as not to change a vehicle speed of the travel machine body 142 before and after changing the rotation speed N whichever of the two kinds N#1 and N#2 the rotating speed N of the engine 70 is changed to.