A feed supply device capable of preventing the backflow of feed from a conveyance line to a feed supply device is provided. In a feed supply device (1) for supplying feed to a transport line using a coreless auger (22), a pair of inclined side walls (11, 12) that are opposed to each other and that are closer to each other as they go downward are provided at the bottom and a pair. The hopper body 10 is arranged so that the coreless auger extends between the lower edges of the inclined side walls, and the upper side is fixed to the upper edge of one inclined side wall 11 and faces the surface of the other inclined side wall 12. And a rectangular backflow prevention plate 30 extending obliquely downward, and a predetermined gap is provided between the lower side of the backflow prevention plate and the other inclined side wall 12. The backflow prevention plate is composed of an upper side main plate 31 and a lower side adjustment plate 32, and the size of the gap can be adjusted by the overlap length in the inclination direction of the main plate and the adjustment plate. [Selection] Figure 1【課題】搬送ラインから飼料供給装置への飼料の逆流を防止することができる飼料供給装置を提供する。【解決手段】飼料をコアレスオーガー２２を用いて搬送ラインへ供給するための飼料供給装置１において、互いに対向しかつ下方に向かうにつれて距離が近づく一対の傾斜側壁１１、１２を底部に具備しかつ一対の傾斜側壁の下縁同士の間に前記コアレスオーガーが延在するように配置されるホッパー本体１０と、一方の傾斜側壁１１の上縁に上辺が固定されかつ他方の傾斜側壁１２の面に向かって斜め下方に延在する矩形の逆流防止板３０とを有し、逆流防止板の下辺と他方の傾斜側壁１２との間に所定の間隙が設けられている。逆流防止板は上辺側の主板３１と下辺側の調整板３２とから構成され、間隙の大きさは主板と調整板との傾斜方向における重なりの長さにより調整可能である。【選択図】図１
