To provide a steering structure in a new tea field-tending machine in a tea ridge-straddling and traveling type, capable of accurately traveling in an automatically steering state even under a bad condition of a tea field or the like formed on a slope land or the like, and if necessary, capable of being operated remotely.

This steering structure controls the traveling direction by detecting the degree of bending of a tea ridge T by a sensor 23 installed in a tea field-tending machine 1 in a tea ridge-bridging and traveling type, changing the output amounts themselves of hydraulic pumps 19A, 19B for driving right and left traveling body 12 according to the situation by actuators 22A, 22B. The output amount of the sensor 23, and the out put amount of control levers of the hydraulic pumps 19A, 19B are compared by a controller, and an opening and shutting displacement magnitudes of the control levers are set according to the output amount of the sensor 23 to carry out the traveling by automatic steering.