A traveling control section of a traveling vehicle is configured to effect a normal operation to control an output of an engine when a vehicle speed is below a set vehicle speed, such that the engine output may correspond to an operation amount of an accelerator operating tool and to effect an output suppressing operation when the vehicle speed is equals to or more than the set vehicle speed, such that the vehicle speed may stay below the set vehicle speed, irrespectively of the operation amount of the accelerator operating tool. A fuel ratio in an air-fuel ratio in the output suppressing operation is set smaller than a fuel ratio in an air-fuel ratio in the normal operation.
