PURPOSE: To prevent grain straws from remaining in a state bitten into a threshing cylinder and a large load from being generated when the operation of a combine is started, by shutting a reaping clutch in interlock with the finish of a reaping work and subsequently shutting a threshing clutch after the passage of a set time.

CONSTITUTION: A reaping section 2 is lifted above a set position, and an motor- driven cylinder 17 is operated with a limit switch 25 and a control device 26. A reaping clutch 16 is shut to stop the reaping section. The counting of a timer is started, and after a set time T is counted, motor-driven cylinders 23, 22 are operated to shut a feed chain clutch 21 and a threshing clutch 20, thus stopping a feed chain 9 and a thresher 7.