To provide a foreign matter sorter having an improved work efficiency.SOLUTION: A foreign matter sorter 10 comprises: a self-propelled traveling vehicle body 20; a scooping unit 30 which scoops up soil; and a sieve part 41 having plural sieves 411a, 411b, 411c which are provided on a flight side of soil which is scooped up by the scooping part 30, receive soil and sort a foreign matter. The sieve part 41 is so formed that a sieve mesh of the plural sieves 411a, 411b, 411c is made into a lattice-like shape and opening dimensions of respective sieve meshes are different from one another. Further, the plural sieves 411a, 411b, 411c are arranged at positions in different height directions at prescribed intervals, and the opening dimension thereof is so set as to gradually decrease as going from top to bottom.SELECTED DRAWING: Figure 1
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