PURPOSE: To provide a sorting wind feed structure in a thresher designed to enable the sorting wind from a winnower to be fed in nearly uniform intensity at respective sites along the left and right direction in a sorting section.

CONSTITUTION: This structure is so designed as to feed respective sieves 7 with sorting wind via a relevant feed port 9d in the rear of a winnower 9 for generating sorting wind. In this case, a guide member 13 is formed so as to feed the aforementioned sorting wind downwardly and backwardly, and a curved wind channel 15 is formed to alter the wind direction so as to change this sorting wind from downwardly oriented mode to upwardly and backwardly oriented mode.