PROBLEM TO BE SOLVED: To provide a threshing and selecting device, capable of maintaining a good selection condition even if the amount of treated materials on a swinging selection shelf is changed.SOLUTION: A thresher is provided by pivoting a position in the upstream side of wind-blowing direction of the selection wind of a first wind-directing plate (29) at the upper side of ventilating port (37) of a winnower (28) as freely and vertically rotatable, pivoting a position in a more down stream side than the end part of the upstream side of the wind-blowing direction of selection wind of a second wind-directing plate (30) at the lower side of the ventilating port (37) as freely and vertically rotatable, and changing the inclined postures of the first wind-directing plate (29) and second wind-directing plate (30) as interlocked in accordance with the detected value of layer thickness of the treated materials detected by a layer thickness sensor (50) installed at the upper side of the swinging selection shelf (21).COPYRIGHT: (C)2012,JPO&INPIT【課題】揺動選別棚上の処理物量が変化しても良好な選別状態を維持できる脱穀選別装置を提供する。【解決手段】唐箕(28)の送風口(37)の上側には、第一風向板(29)の選別風の送風方向上手側の部位を上下回動自在に軸支し、前記送風口(37)の下側には、第二風向板(30)の選別風の送風方向上手側端部よりも下手側の部位を上下回動自在に軸支し、揺動選別棚(21)の上側に設けた層厚センサ(50)が検出する被処理物層厚の検出値に応じて、第一風向板(29)及び第二風向板(30)の傾斜姿勢を連動して変更する。【選択図】 図2