PROBLEM TO BE SOLVED: To provide a combine harvester capable of accurately measuring water content contained in grains while smoothly discharging grains in a grain tank.SOLUTION: A feeding device (16) for feeding grains into a grain tank (5) is configured to discharge grains toward a moisture meter (17) arranged at a rear part in the grain tank (5) through a feeding port (21) formed at an upper front part of the grain tank (5). A top plate (20) of the grain tank (5) has an inclined part (23) inclining in a front upper fashion from an upper edge of the rear face (18) so that the feeding port (21) is arranged at a position higher than the upper edge of the rear face (18). The moisture meter (17) is arranged at a vicinity of the upper edge of the rear face (18). An oscillation device for vibrating the inner side plate (22) of the grain tank (5) is arranged at a lower rear part of an inner side plate (22) so as to allow the spiral discharging device (11) to discharge the grains in the grain tank (5) more smoothly.SELECTED DRAWING: Figure 13
