PROBLEM TO BE SOLVED: To provide a threshing device comprising a cutting chamber that can efficiently discharge waste culms to outside.SOLUTION: A rotating body (54) including a plurality of rotary blades (51) is laid horizontally at an upper portion of a cutting chamber (50), and receiving blades (52) that rise up or fall down are provided at a lower portion of the cutting chamber (50). When the receiving blades (52) fall down, blade portions (52A) of the receiving blades (52) are positioned below a lower end of an outer circumference trajectory of the rotary blades (51).COPYRIGHT: (C)2014,JPO&INPIT【課題】排桿を効率良く外部に排出することができる切断処理室を備えた脱穀装置を提供する。【解決手段】切断処理室(50)の上部に複数の回転刃(51)を有する回転体(54)を横架し、切断処理室(50)の下部に起立及び倒伏する受刃(52)を設け、倒伏した状態にある受刃(52)の刃部(52A)が、回転刃(51)の外周軌跡の下端よりも下側に位置する構成とすることにより解決される。【選択図】図7