The invention provides a combine which can allow a grain storage device equipped with a conveying cylinder rotating up and down around an axis in a front and back direction of a machine body to rotate in a direction outside the machine body without interference with the conveying cylinder, thus improving maintainance efficiency. A conveying screw (8) is disposed between a front wall (1f) and a back wall (28) of the grain storage device (1); a front side part of a first cylinder part (2) is fixed at the lower part of the back wall (28) of the grain storage device (1); the back side part of the first cylinder part (2) is axially connected with a front side part of a second cylinder part (4) fixed at a side of a machine body frame (3) through a first vertical shaft (5) with a same axis as a second axis (Z) in a free engagement and separation manner; the back side part of the second cylinder part (4) is engaged with a front side part of a third cylinder part (7) disposed at a base part of a conveying cylinder (6) in a manner of free relative rotation around an axis of the conveying screw (8) coaxial with a first axis (Y).