PROBLEM TO BE SOLVED: To provide a sphygmomanometer which enables correct measurement of blood pressure in the case when the upper arm of a patient is thicker than usual.SOLUTION: A sphygmomanometer includes an arm band part and measures blood pressure by winding the arm band part around the upper arm of a person to be measured and by applying pressure thereto. The sphygmomanometer includes an air bag 20 for ischemia which is disposed in the arm band part and presses an artery of the upper arm to perform the ischemia by sending air thereto, and an air bag 40 for detecting artery pulsation which is fixed to the air bag 20 for ischemia and detects the pulsation of the artery of the upper arm by sending air thereto. The air bag 20 for ischemia is formed into a shape of a sector protruding toward the upstream side of the artery of the upper arm.COPYRIGHT: (C)2013,JPO&INPIT【課題】患者の上腕が通常よりも太い場合に、血圧測定を正確に行える血圧計を提供する。【解決手段】血圧計は、腕帯部を有し、腕帯部を被測定者の上腕に巻いて加圧することで血圧を測定するが、腕帯部に配置されており、空気を送ることで上腕の動脈を圧迫して阻血する阻血用空気袋20と、阻血用空気袋20に固定されており、空気を送ることで上腕の動脈の拍動を検出する動脈拍動検出用の空気袋40を有し、阻血用空気袋20は、上腕の動脈の上流側に向けて凸状となる扇形に形成されている。【選択図】図7