PROBLEM TO BE SOLVED: To attach a capture bag manufactured by joining the bottom and edge of two resin meshes with a breathable fixed tube to a suction tube of a vacuum cleaner, and sucked small pests from the two resin sheets. Provided is a small pest trap that is sandwiched between meshes and dies by pressure, in which the fixed tube does not drop even when suction is stopped and the suction tube is tilted downward. A drop prevention clip (2) sandwiches the inside of the fixed tube (1) and the outside of the suction tube (5) to prevent the fixed tube from falling off. [Selection diagram] Fig. 3【課題】通気性のある固定管で二枚の樹脂メッシュの底と縁を接合して製作された捕獲袋を真空掃除機の吸引管に装着し、吸引された小害虫が前記二枚の樹脂メッシュに挟まれて圧死する小害虫捕獲器において、吸引を停止して前記吸引菅を下方に傾けた時も前記固定菅が脱落しない小害虫捕獲器を提供する。【解決手段】脱落防止クリップ2で前記固定菅1の内側と前記吸引菅5の外側を挟んで前記固定菅の脱落を防止する。【選択図】図3