PURPOSE: A threshing apparatus is provided to smoothly transfer the straw fragments in a threshing chamber to a dust processing chamber and to improve the grain screening accuracy and efficiency by preventing large straw fragments from falling to a shaking separator shelf. CONSTITUTION: A threshing apparatus comprises a supply drum(11) installed through a shaft between a first side plate of the front side and a second side plate of the back side of a threshing chamber； a dust processing chamber(30) connected to one side of the back side of the threshing chamber； a shaking separator shelf(22) installed on the lower side of the threshing chamber； and the components successively installed on the shaking separator shelf including a winnower(19) sending the air, a first collection unit(27) collecting a first object and a second collection unit collecting a second object. The rear end of the supply drum is protruded farther than a supply net provided on the outer circumference of the lower part of the drum, and a connection unit connected with the dust processing chamber is formed on the portion in between the rear end of the supply net and the second side plate of the threshing chamber. The connection unit is formed with a third collection unit on the back side, and the third collection unit is equipped with a support member on the bottom part.本發明提供一種脫粒裝置，其提高了脫粒裝置的脫粒篩選精度及篩選效率。在脫粒室(12)中的脫粒網(18)的後端部與第二側板(17)之間的部位，分別形成與排塵處理室(30)連通的連通部(H)、和位於連通部(H)的後側並在擺動篩選架(22)上開口的第三回收部(S)，在第三回收部(S)的底部具有支承脫粒後的排出稈的穗尖側的部位的支承部件(48)，在連通部(H)的底部具有過濾處理物的過濾部件(100)，在過濾部件(100)中的前後方向上的中間的部位，設置有對過濾部件(100)上的處理物向後方的運送施加阻力的第一隔板(51)。
