PROBLEM TO BE SOLVED: To prevent waste straws from stacking in a lower space of an entrance plate in a structure allowing a reaping transportation unit and a threshing unit to be assembled favorably.SOLUTION: A combine harvester includes an entrance plate 15 which guides reaped grain culm reaped and transported rearward by the reaping transportation unit to a grain culm feeding port 24 formed at a front side face of a threshing unit 4, a guide plate 45 which guides waste straws dropped from a transfer position between the reaping transportation unit and the entrance plate 15 to the outside rather than the lower space of the entrance plate 15, and a gap filling member 71 formed of a soft material and arranged between the guide plate 45 and the entrance plate 15.
