The invention relates to a combine harvester, wherein the variable speed of the vehicle is limited within the applicable range for farmlands and crops.Meanwhile, the operation of the combine harvester and the harvesting efficiency thereof are improved.The inclination angle of the inclined board of the hydraulic motor of a hydrostatic stepless speed change gear can be switched to a low-speed driving side or a high-speed driving side.When the inclination angle of the inclined board of the hydraulic motor is switched to the low-speed driving side, a maximum speed setting meter dial for the changing setting of the highest speed due to the high speed position of the gearshift is provided.Meanwhile, the maximum speed setting is available only when the inclination angle of the inclined board of the hydraulic motor is switched to the low-speed driving side.When the maximum speed is set and the inclination angle of the inclined board of the hydraulic motor is switched from the low-speed driving side to the high-speed driving side, the maximum speed setting set by the meter dial is unavailable.將車速之變速範圍限制於適於農地條件或作物條件之範圍，提高收割作業中之聯合收穫機之操作性及收割作業之效率。；使行進用靜油壓式無段變速裝置(12)之油壓馬達(16)之斜板即馬達斜板(17)之傾斜角度可切換至低速行進側與高速行進側，並設置在將該馬達斜板(17)之傾斜角度切換至低速行進側之狀態下變更設定將前述變速搖桿(13)操作為最高速位置時之最高車速之最高車速設定刻度盤(51)。此外，使此最高車速之設定僅在馬達斜板(17)之傾斜角度被切換至低速行進側之狀態下為有效，在設定最高車速後馬達斜板(17)之傾斜角度從低速行進側被切換至高速行進側時，使以前述最高車速設定刻度盤(51)進行之最高車速之設定為無效。
