PROBLEM TO BE SOLVED: To provide a sphygmomanometer with which positional deviation of a cuff in the circumferential direction of a measurement part can be permitted to some extent and the blood pressure can be measured accurately.SOLUTION: A main body 10 equipped with a pump, a belt 2 and a cuff structure 20 are provided. The cuff structure 20 has a belt-like shape, is placed facing the inner peripheral surface of the belt 2 and has an end 20f attached to the main body 10. The cuff structure 20 includes a bag-like shaped pressure cuff 23 extending along the circumferential direction of the measurement part, a bag-like shaped sensing cuff 21 extending in the circumferential direction to cross the artery passage part in the measurement part and a back board 22 inserted between the pressure cuff 23 and the sensing cuff 21. A pressurizing fluid is supplied from the pump to the pressure cuff 23 to pressure the measurement part. The blood pressure is computed according to the pressure of the liquid for pressure transmission stored in the sensing cuff 21.SELECTED DRAWING: Figure 2【課題】被測定部位の周方向に関してカフの位置ずれを或る程度許容でき、血圧を精度良く測定できる血圧計を提供すること。【解決手段】ポンプを搭載した本体１０と、ベルト２と、カフ構造体２０とを備える。カフ構造体２０は、帯状で、ベルト２の内周面に対向して配置され、本体１０に一端２０ｆが取り付けられている。カフ構造体２０は、被測定部位の周方向に沿って延在する袋状の押圧カフ２３と、被測定部位の動脈通過部分を横切るように周方向に延在する袋状のセンシングカフ２１と、押圧カフ２３とセンシングカフ２１との間に介挿された背板２２とを含む。ポンプから押圧カフ２３に加圧用の流体を供給して被測定部位を圧迫する。センシングカフ２１に収容された圧力伝達用の流体の圧力に基づいて血圧を算出する。【選択図】図２
