PURPOSE: To eliminate a delay in conveyance of reaped stems and culms on the right side and enable the good delivery of the reaped stems and culms to a vertical conveyor without remarkable reduction in travel speed or clogging in a middle divided reaping responsive type simple three-row combine harvester in which the vertical conveyor is constructed so as to enable the free vertical rocking around the rear fulcrum and a grass divider on the right side is arranged greatly separated to the right.

CONSTITUTION: In a simple three-row combine harvester equipped with a vertical conveyor 9 so as to enable the free vertical rocking thereof around the rear fulcrum, the objective reaping part is obtained by arranging a raking in rotating body 8 acting on the plant foot part for guiding and transferring raised up stems and culms to a position on the starting end side of a conveying passage (W) of the vertical conveyor 9 respectively after the first, second and third raising up devices (7a), (7b) and (7c), locating the starting end of an ear tip engaging and conveying mechanism (9A) between the right and the left of the first raking in rotating body (8a) on the right side and the second raking in rotating body (8b) in the center and installing an auxiliary conveyor 13 of a driving structure on the loosened side using the raking in rotating body (8a) on the right side as the driving side.