PROBLEM TO BE SOLVED: To provide a combine harvester smoothly executing manual work and having improved safety.SOLUTION: The combine harvester includes: a manual switch 42 that is depressed to drive a feed chain 16 (a grain culm conveyance device) and is released to stop the feed chain 16 and a manual base 49 (a grain culm support body) that can be switched between a support attitude for supporting the manual grain culm and a retraction attitude being retracted upward the feed chain 16. When the manual base 49 is in the support attitude, the combine harvester allows an operation signal from the manual switch 42, however, when the manual base is in the retraction attitude, does not allow the operation signal from the manual switch 42.
