PROBLEM TO BE SOLVED: To provide organism capture means capable of being installed in an easy and diverse position, and to provide means capable of easily and accurately acquiring a distribution situation of an organism.SOLUTION: An organism capture implement A installed in a water area or a land includes: a basket-like body 1 formed in a nearly basket-like shape by a net-like member 11 formed with meshes having size allowing passage of a target organism, and filled with infilling materials 12 inside the basket； and a bag-like body 2 capable of covering the whole side wall circumference 14 of the basket-like body 1. The organism capture implement A is brought into a state that the whole side face circumference 14 of the basket-like body is exposed by folding the bag-like body 2 at the time of the installation, and is brought into a state that the whole circumferential side face 14 of the basket-like body 1 is covered by expanding the bg-like body 2 when capturing an organism.【課題】簡易かつ多様な場所に設置可能な生物捕捉手段の提供、並びに生物の分布状況を簡易かつ正確に把握できる手段の提供。【解決手段】水域又は陸域に設置する生物捕捉器具Ａであって、対象生物の通行可能な大きさの目合いが形成された網状部材１１により略籠状に形成され、前記籠内に中詰材１２が充填された籠状体１、及び、籠状体１の側面全周１４を被覆することが可能な袋状体２を備え、設置時には、袋状体２が畳まれることにより籠状体の側面全周１４が露出した状態にされ、生物を捕捉する際には、袋状体２を拡げることにより籠状体１の全周側面１４が被覆された状態にされる構成である生物捕捉器具Ａとする。【選択図】図１
