PROBLEM TO BE SOLVED: To provide an oscillating and separating device capable of avoiding faults such as abnormal noise and damages to members caused by a contact between a rail member and a rotary body even when the side opposite to an oscillating drive mechanism of a separation part is displaced in the width direction of the separation part.SOLUTION: The oscillating and separating device includes: rotary bodies 24 rotatable around a shaft center X1 along the width direction, provided at both lateral sides in the width direction on the other end side in the oscillating direction of the separation part a groove type rail member 25 for guiding rotational transfer of the rotary body 24 when the separation part oscillates and a contact prevention member 49 which prevents contract in the shaft center X1 direction between a vertical wall part 25B on the outer side in the width direction of the rail member 25 and the rotary body 24.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2017,JPO&INPIT【課題】選別部のうち揺動駆動機構とは反対側が選別部の幅方向に位置ズレした場合でも、レール部材と回転体との接触に起因する異音や部材の損傷等の不具合を回避可能な揺動選別装置が要望されている。【解決手段】選別部の揺動方向他端側のうち幅方向における両横側部に設けられ、幅方向に沿う軸心X1周りに回転可能な回転体24と、選別部の揺動時において、回転体24の回転移動を案内する溝型形状のレール部材25と、レール部材25のうち幅方向外側の縦壁部25Bと回転体24との軸心X1方向における接触を防止する接触防止部材49と、を備える。【選択図】図5