PURPOSE: To obtain a four-wheels drive agricultural motor tractor having whole cage wheels capable of readily forming a flat stabilized tilling ground and preventing damage of the motor tractor itself by excluding intrusion of wheels into the tilling ground.

CONSTITUTION: In the objective four-wheels drive agricultural motor tractor 10 having front wheels 14 and rear wheels 15 wherein all of the four wheels are driving wheels, cage wheels are used as all of the front wheels 14 and the rear wheels 15 in a surface soil paddling operation.