PROBLEM TO BE SOLVED: To enhance efficiency of manual threshing work.SOLUTION: A combine includes a manual threshing regulation member 18 which is switched between a regulation state and a regulation- cancelled state. In the regulation state, the manual threshing regulation member is arranged at a position facing an upper side of a conveyance start end of a threshing feed chain 8 and regulates feed of manual threshing grain culms, and in the regulation-cancelled state, the manual threshing regulation member retreats to an upper side from the conveyance start end of the threshing feed chain 8 and permits the feed of manual threshing grain culms. A gap in a vertical direction serving as a conveyance passage of the grain culms to be taken-over from a reaping device 3 side to a threshing feed chain 8 side is kept between the conveyance start end of the threshing feed chain 8 and the manual threshing regulation member 18 in the regulation state. When the manual threshing regulation member 18 retreats to the upper side and the upper side of the conveyance start end of the threshing feed chain 8 is opened, a conveyance speed of the threshing feed chain 8 is switched from a gear change control state performing a gear change in linkage with a vehicle speed to a manual threshing mode driven at a fixed speed regardless of the vehicle speed.SELECTED DRAWING: Figure 3
