PURPOSE: To provide a combine having a small turning circle for turning in different directions smoothly and having no inconvenience to dig up ground means of a caterpillar while turning.

CONSTITUTION: A combine is formed by mounting a rotary supporting leg 4 for moving up and down by a hydraulic cylinder in a rear side center part of a car body B and attaching a footboard 5 for landing the leg on the ground to push up the car body B and transferring load from the caterpillar to the footboard 5 and enabling the rotary supporting leg 4 for turning in different directions. A horizontal turning device for turning in different directions can be mounted between the car body B and the footboard 5 in order to perform the turning movement easily.