To provide a steering part structure of a combine harvester capable of performing an engine rotation adjustment by an engine-controlling lever and a series of transmission operations of a sub-transmission lever and main transmission lever smoothly, and making the driving performed by an operator in a standing posture easier.

This combine harvester 1 installed with a steering part 6 consisting of a front part steering panel part 11 installed with a steering device 13 at the front and side directions of the steering seat 8 and a side steering panel part 12 installing a main transmission lever 15 performing the advancing and retreating transmission of the machine body, a sub-transmission lever 16 transmitting the traveling speed secondarily, and an implement part lever 19 performing the putting on and off of a power for a pre-treating part 3 and threshing part 5 at a traveling machine body 1b equipped with a working part such as the pre-treating part 3 and threshing part 5 , etc., is provided by installing the main transmission lever 15 and sub-transmission lever 16 as capable of operating in front and rear direction as annexed and close to the inside and close to the outside of the front part of the side part steering panel part 12 respectively, and installing an engine controlling lever 2 for adjusting the rotation of the engine at the rear direction of the sub-transmission lever 16.