PROBLEM TO BE SOLVED: To prevent rainwater, etc. from entering the inside a body case from a hole formed for detecting a sound in an animal repellent device.SOLUTION: An animal repellent device includes a body case 50 for accommodating a sound sensor 46f. A hole 53 for causing a sound to reach the sound sensor 46f is formed in a side wall part 51 of the body case 50. The circumference of the hole 53 in the side wall part 51 of the body case 50 is formed so as to be recessed toward the inside of the body case 50.SELECTED DRAWING: Figure 5