PROBLEM TO BE SOLVED: To provide a combine harvester capable of improving a separation seed of grains while keeping separation accuracy of the grains high.SOLUTION: A combine harvester 100 comprises a threshing device 3 for threshing reaped grain culm, and a separation device 4 for separating grains G from threshed objects C. The separation device 4 has a structure in which a chaff sieve 412 is disposed behind a feed pan 411, and a separator 414 is disposed above the chaff sieve 412. By disposing the separator 414 behind and above the feed pan 411, a passage P through which the threshed objects C pass from the feed pan 411 to the chaff sieve 412 is configured.
