PROBLEM TO BE SOLVED: To avoid a decline in accuracy for detecting grain weight so as to make weight of the grain tank stably act on in detecting weight of a grain tank using a load cell.SOLUTION: A combine harvester includes: a grain tank 5 mounted on a machine frame to store grain; and a load cell 60 on which the grain tank 5 is placed to measure grain weight stored in a grain tank 5.SELECTED DRAWING: Figure 6