PROBLEM TO BE SOLVED: To provide an insect pest extermination device capable of producing a sufficient insecticidal effect, in which a liquid bait agent hardly volatilizes so that the insecticidal effect can last long.SOLUTION: An insect pest extermination device 1 includes an impregnation body 10 impregnated with a liquid bait agent and a container 20 for holding the impregnation body 10, and is formed with an exposed part 12, in which at least part of the top face of the impregnation body 10 is exposed in the air. The insect pest extermination device causes insect pests to eat the liquid bait agent impregnated in the impregnation body 10, in which, when a periphery length (mm) of an eaten region 30 surrounding the exposed part 12 in a plane view is represented by L, and an area (mm2) of the exposed part 12 is represented by S, S/L is 1.1-5.0.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】本発明は、充分な殺虫効果が得られ、また液体ベイト剤が揮散しにくく殺虫効果が長持ちしやすい害虫駆除装置を提供することを目的とする。【解決手段】液体ベイト剤を含浸させた含浸体１０と、含浸体１０が収容される容器２０とを備え、含浸体１０の少なくとも上面の一部が気中に露出した露出部１２が形成され、平面視で露出部１２を囲う喫食領域３０の周囲長（ｍｍ）をＬ、露出部１２の面積（ｍｍ２）をＳとしたとき、Ｓ／Ｌが１．１～５．０である、含浸体１０に含浸させた液体ベイト剤を害虫に喫食させる害虫駆除装置１。【選択図】図１
