PROBLEM TO BE SOLVED: To provide a wrist-type sphygmomanometer which comprises a body to be positioned on a dorsal aspect of a wrist and a cuff to be wrapped around and worn on the wrist, the cuff extending from an end of the body, and is favorably applicable to users of various wrist circumferences.SOLUTION: A sphygmomanometer comprises: a body on which a pump is mounted, and which is to be positioned on a dorsal aspect 90g of a wrist 90； and a cuff which is to be wrapped around and worn on the wrist 90. The cuff extends from an ulnar-side end of the body in the circumferential direction of the wrist 90 to a palmar side 90p, and is set to a length such that the cuff covers an ulnar artery 92 of a wrist 90max having a preset maximal wrist circumference, or a length 21s-21e such that the cuff extends past the ulnar artery 92 to cover a radial artery 91. A fluid is supplied from the pump to the cuff to compress the wrist. Blood pressure is calculated on the basis of the pressure of the fluid contained in the cuff.SELECTED DRAWING: Figure 20【課題】手首の背側面に配置されるべき本体と、本体の一端から延在し手首を取り巻いて装着されるべきカフとを備えた手首式の血圧計であって、大小様々な手首周のユーザに好ましく適用可能なものを提供すること。【解決手段】手首９０の背側面９０ｇに配置されるべき、ポンプを搭載した本体と、手首９０を取り巻いて装着されるべきカフとを備える。カフは、本体の尺骨側端部から手首９０の周方向に沿って掌側面９０ｐへ延在し、予め設定された最大手首周をもつ手首９０ｍａｘの尺骨動脈９２を覆う長さ、または、尺骨動脈９２を越えて橈骨動脈９１を覆う長さ２１ｓ～２１ｅに設定されている。ポンプからカフに流体を供給して手首を圧迫する。カフに収容された流体の圧力に基づいて血圧を算出する。【選択図】図２０
