[ Challenge ] with a simple structure , to provide a small animal repellent device that can maintain the repellent effect . A small animal repellent device of the present invention , the fluid 13 is filled in a sealed state , an inner bag 11 made of a film material , the inner bag 11 is filled with a gas in a sealed state , the outside made of a film material and a pouch 12 , a percentage with respect to the internal volume of the inner bag 11 of the fluid 13 is in the range of 50% to 80% , accounting for the internal volume of the outer bag 12 of the bag 11 and the gas , in the range of 10% to 50% . [ Selection Figure ] Figure 2【課題】簡単な構成で、忌避効果が維持できる小動物忌避具を提供する。【解決手段】本発明の小動物忌避具は、流動体13が密閉状態で充填された、フィルム材からなる内袋11と、内袋11が気体とともに密閉状態で封入された、フィルム材からなる外袋12とを備え、流動体13の内袋11の内容積に対して占める割合は、50~80%の範囲にあり、内袋11及び気体の外袋12の内容積に対して占める割合は、10~50%の範囲にある。【選択図】図2