PROBLEM TO BE SOLVED: To provide a thresher which comprises emergency operation means for performing an emergency operation for stopping the rotation of a threshing cylinder and opening a cover body, and prevents the scatter of a treated object or the like to the outside of a threshing chamber at the emergency operation.SOLUTION: A thresher comprises: a cover body 13 for opening and closing a threshing chamber 11 which is internally fit with a threshing cylinder 9 a feed chain 12 arranged at the side of the threshing cylinder 9 and transferring grain culms in a state that ear tips are oriented toward the threshing cylinder 9 side and a gripper 14 arranged at the cover body 13 side and gripping plant food sides of the grain culms in transfer together with the feed chain 12 at the closing of the cover body 13. The thresher also has rotation stop means which stops the rotation of the threshing cylinder 9 when the emergency operation is performed by the emergency operation means 31, and release means which releases gripping of the gripper 14 and the feed chain 12 by opening the cover body 13 after a rotation stop operation of the threshing cylinder 9 by the rotation stop means.COPYRIGHT: (C)2014,JPO&INPIT【課題】 扱胴の回転を停止させるとともにカバー体を開作動させる緊急操作を行う緊急操作手段を備え、上記緊急操作した場合における処理物等の扱室外への飛散が防止される脱穀装置を提供することを課題とする。【解決手段】 扱胴9が内装された扱室11を開閉するカバー体13と、前記扱胴9の側方に配置されて穂先が扱胴9側を向いた状態の穀稈を搬送するフィードチェーン12と、カバー体13側に設けられ且つカバー体13の閉状態時にフィードチェーン12と共に搬送中の穀稈の株元側を挟持する挟持体14とを備えた脱穀装置において、緊急操作手段31によって緊急操作が行われた場合に扱胴9の回転を停止させる回転停止手段と、該回転停止手段による扱胴9の回転停止作動後にカバー体13を開作動させて挟持体14及びフィードチェーン12による挟持を解除する解除手段とを有する。【選択図】 図3