PROBLEM TO BE SOLVED: To reduce processing load during an oscillatory classification device while preventing a large amount of grains from being discharged to cause loss.SOLUTION: An oscillatory classification device of a thresher includes: a grain pan 25 positioned on a side of a starting end in a transfer direction； and screening lines 27, 28 positioned on a side of a downstream end in a transfer direction of the grain pan 25. The screening lines 27, 28 are made of a plurality of linear members extending in a cantilevered manner and aligned while spaced apart in a lateral width direction. The plurality of linear members include: a plurality of first linear members 34a having a free end positioned at a larger height； and a plurality of second linear members 34b having a free end positioned at a smaller height than the height of the first linear member 34a.SELECTED DRAWING: Figure 2
