The utility model provides a threshing part of an all feeding type combine-harvester. The threshing part can simplify the structure of a guide part which guides threshing treatment objects of a threshing barrel to the position below a screen. The threshing part is provided with the threshing barrel (11), the screen (12) covering the periphery of the position below the threshing barrel (11), and a guide plate (14) which guides the threshing treatment objects generated by the threshing barrel (11) to the position below the screen (12), wherein the guide plate (14) is arranged on the upstream side of the rotation direction of the threshing barrel (11) in the screen (12).