PROBLEM TO BE SOLVED: To provide a measuring tool capable of arranging an electrode easily on a proper position of an organism.SOLUTION: A measuring tool (10) includes a main installation part (1) having at least one hole part (2) to be penetrated by an animal leg, and installed on the shell of an animal, and an electrode belt (5) having an electrode (6) for acquiring biological information of the animal, and arranged to at least one of the hole parts (2). The electrode belt (5) is arranged in advance in the state of crossing the hole part (2) so as to pass through an armpit of the animal upon installation.SELECTED DRAWING: Figure 1【課題】生体における適切な位置に電極を配置しやすい測定具を実現する。【解決手段】測定具（１０）は、動物の脚を通す少なくとも１つの孔部（２）を有し、動物の胴体に装着される主装着部（１）と、動物の生体情報を取得するための電極（６）を有し、孔部（２）の少なくとも１つに対して配された電極ベルト（５）とを備え、電極ベルト（５）は、装着時に動物の腋窩を通るように孔部（２）を横断して予め配されている。【選択図】図１
