PROBLEM TO BE SOLVED: To provide a sphygmomanometer capable of measuring blood pressure accurately even when the blood pressure is measured by pressing a cuff for measuring the blood pressure through an intervening member, and the method/apparatus for measuring the blood pressure.SOLUTION: A sensing cuff 21 to be circumferentially wound around and mounted on the wrist as a measurement part； a back board 22 arranged along the surface opposite to the wrist on the sensing cuff； and a pressing member such as a pressure cuff pressing the back board to the wrist are provided, and the surface 22g facing the measurement part of both side marginal parts 22f in the width direction along the longer direction on the measurement part of the back board is curved in the direction apart from the measurement part to the tip end.SELECTED DRAWING: Figure 21【課題】介在部材を介して血圧測定用カフの押圧を行って血圧を測定する場合でも、血圧を精度良く測定できる血圧計および血圧測定方法並びに機器を提供する。【解決手段】被測定部位としての手首を取り巻いて装着されるべきセンシングカフ２１と、センシングカフに対して、手首とは反対側の面に沿って配置される背板２２と、背板を手首へ向けて押圧する押圧カフ等の押圧部材とを備え、背板の被測定部位の長手方向に沿った幅方向における両側の縁部２２ｆの被測定部位に対向する面２２ｇは、先端に向かうに連れて被測定部位から遠ざかる向きに湾曲している。【選択図】図２１
