To provide a tubular fish measuring instrument which measures or photographs directly without touching a fish body, reduces drying of the fish body, makes the fish less susceptible to weakness and is less likely to be damaged.SOLUTION: In a tubular fish body storage bag body 1 made of a flexible material, a scale portion 40 along the length direction of the stored fish body F is formed, and the tubular fish body storage bag body 1 in the longitudinal direction The front portion of the fish body storage bag 1 positioned before the zero point of the scale portion 40 is formed as a folding margin portion 70 and the fish body storage bag 1 Wherein the front end opening portion of the tubular fish body measuring instrument is deformable in a closed state.BACKGROUND OF THE INVENTION【課題】直接魚体に触れることなく計測あるいは撮影でき、魚体の乾燥を低減し、魚が弱りにくく損傷しにくくした筒状魚体計測器具を提供する。【解決手段】可撓性素材よりなる筒状の魚体収納袋体1に収納魚体Fの長さ方向に沿った目盛り部40を形成し、前記筒状の魚体収納袋体1を長さ方向において上下に開閉自在に構成し、さらに前記目盛り部40のゼロ点の前に位置する魚体収納袋体1の前部を折りしろ部70とし、該折りしろ部70の折曲により魚体収納袋体1の前端開放部を閉塞状に変形可能としたことを特徴とする筒状魚体計測器具。【選択図】図1
