This pest repellent device is very durable and easy to use, and uses a sound that causes minimal discomfort to humans but that has an excellent repellent effect on pests and can reliably repel pests. This pest repellent device is provided with a motor 40 which is connected to a power source 36, and a synthetic resin weight 46 which is connected to a rotation shaft 42 rotated by the motor 40 and which is swung by rotation of the motor 40. The device has a sound generating cylinder member 14, which is a cylinder body surrounding the weight 46. The sound generating cylinder member 14 is a cylinder with a polygonal cross section； one end of the sound generating cylinder member 14 is opened and the other end is closed by a plate-shape top surface 20. A housing cylinder member 12, which is a smaller-diameter cylinder body, passes through the top surface 20. The sound generating cylinder member 14 is suspended from a tripod 60, is retained on the tripod 60 with multiple link retainer members 66, and is arranged so as to prevent vibration. With rotation of the motor 40, the weight 46 collides with the inner peripheral surface of the sound generating cylinder member 14 to generate a percussive sound with a frequency of 200-500 Hz, to which pests exhibit an aversive reaction.一種有害動物迴避裝置，耐用性高且可以易於使用，使用對人不適感較小的聲音，而具有高的有害動物迴避效果而能確實地驅趕。本發明具備：連接於電源36的馬達40；以及重塊46，連接藉由馬達40旋轉的旋轉軸42並藉由馬達40的旋轉而搖動。本發明具備發聲筒構件14，其是包圍重塊46的筒體。發聲筒構件14形成為截面是多邊形的筒體，前述發聲筒構件14的其中一個端部呈開口，另一個端部在板狀的上表面部20被封閉。小直徑的筒體的收容筒構件12貫穿上表面部20。發聲筒構件14被設置為懸吊在三腳60，透過多個連結保持構件66，保持於三腳60，並且防止搖動。藉由馬達40的旋轉，重塊46撞擊發聲筒構件14的內周面，產生頻率為200Hz~800Hz之使有害動物會表現迴避反應的打擊聲。
