PROBLEM TO BE SOLVED: To provide a combine-harvester enabled to perform a yield detection precisely by devising the arrangement position of a yield sensor for a grain tank.SOLUTION: A grain tank 5 is equipped with a contact part for contacting the detection part of a yield sensor 60, and the contact part is disposed below the portion, at which a bottom screw 51 is positioned. The yield sensor 60 is disposed such that the detection part protrudes upward more than the airframe frame, and is disposed at a sensor mounting part 13 set at a position lower than the airframe frame.SELECTED DRAWING: Figure 3