PROBLEM TO BE SOLVED: To provide a threshing method which reduces power consumption in threshing together with reduction of production of broken ears and straw dusts and also cereal grains attached with branches in threshing.SOLUTION: Grain-attaching parts of the ears of grain culm are made to collide and shed to a linear member (2) set at a predetermined position. Alternately, the linear member (2) and the grain-attaching parts of the ear of grain culm are set to move mutually in reverse directions to collide and shed. The thresher used in the method is provided with a ear shooter (18) discharging the ears of grain culm to a net (3), and a pair of right and left propelling wheels (13a, 13b) which discharge the net (3) to the ear shooter (18).COPYRIGHT: (C)2010,JPO&INPIT【課題】脱穀に要する消費馬力を小さくすると共に、脱穀時の穂切れや藁屑の発生、および枝梗付着粒の発生を少なくする。【解決手段】定位置に設けた線状部材(2)に対して穀稈の穂部の着粒部を衝突させて穀粒を脱粒させる。または、線状部材(2)と穀稈の穂部の着粒部とを互いに逆方向に移動させて衝突させることで穀粒を脱粒させる。この脱穀方法に用いる脱穀装置として、穀稈の穂部を網(3)に向けて発射する穂部シューター(18)と、網(3)を穂部シューター(18)に向けて発射する左右一対の推進輪(13a,13b)を設ける。【選択図】図11