PROBLEM TO BE SOLVED: To improve operation efficiency of a combine harvester by enabling easily removing grain culm and the like clogged in a threshing unit conveying device.SOLUTION: A threshing unit conveying device (12) installed in the side part of a thresher (3) comprises: a feed chain (12B)； and a clamping rod (12A) arranged at an upper side of the feed chain (12B). The clamping rod (12A) is energized to the side of the feed chain (12B) by energization means (14) such as a spring. When an operation tool (6D) arranged at a periphery of the threshing unit conveying device (12) is operated, the clamping rod (12A) moves upward and debris between the clamping rod (12A) and the feed chain (12B) can be removed. When the operation tool (6D) is operated, a controller (85) releases a lock mechanism locking the clamping rod (12A) on the feed chain (12B) to move the clamping rod (12A) upward.SELECTED DRAWING: Figure 20
