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.La présente invention concerne un dispositif répulsif contre les animaux nuisibles très durable et facile à utiliser, et qui utilise un son qui provoque un inconfort minimal pour les personnes mais qui présente un excellent effet répulsif pour les animaux nuisibles et peut repousser les animaux nuisibles de manière fiable. Ledit dispositif répulsif contre les animaux nuisibles est muni d'un moteur (40) qui est branché à une source d'alimentation (36), et un poids de résine synthétique (46) qui est relié à une tige de rotation (42) que le moteur (40) fait tourner et qui bascule par la rotation du moteur (40). Le dispositif présente un élément cylindrique générateur de son (14), qui est un corps cylindrique
