To provide a fish weighing scale having a waterproof mechanism capable of making a liquid-tight inside a fish weighing scale without hindering accurate weight measurement.SOLUTION: In the fish weighing scale, the gripping portion 2 is disposed so as to be vertically movable in a state that it is spaced from the inner circumferential surface of the case in the case 10, the upper portion is connected to the weight measurement portion 24, A support portion 40 to which the holding portion is connected, and a waterproof portion 50 for preventing water from entering into the case from the lower side. The waterproof portion 50 has a substantially tubular bellows portion 51 which is bridged between the lower end portion of the case and the lower portion of the support portion and is expandable in the vertical direction. At the lower end portion of the bellows portion, A lower attachment portion 52 attached and fixed to the lower end portion in a liquid tight manner is integrally provided, and on the upper end portion of the bellows portion, the upper attachment portion is mounted and fixed to the lower portion of the support portion in a liquid-An upper attachment portion 53 is integrally provided.(FIG.【課題】正確な重量計測を妨げることなく魚重量計内を液密状にすることができる防水機構を備えた魚重量計を提供する。【解決手段】魚重量計において、把持部2は、ケース10内にケースの内周面と間隔をあけた状態で上下移動可能に配設され、上部が重量測定部24に連結されかつ下部に保持部が連結される支持部40と、ケース内に下側から水が浸入するのを防ぐための防水部50と、を含む。防水部50は、ケース内の下端部と支持部の下部との間に架け渡されて上下方向に伸縮可能な略筒状の蛇腹部51を有し、蛇腹部の下端部には、ケースの下端部に液密状に取付固定される下側取付部52が一体に設けられている一方、蛇腹部の上端部には、支持部の下部に液密状に圧接した状態で取付固定される上側取付部53が一体に設けられている。【選択図】図4
