To provide a blood pressure measuring device that can be miniaturized.SOLUTION: A blood pressure measuring device 1 includes: an outer case 31； a base part 33； a pump 14 installed on one direction side of a circumferential direction VI of a living body 100 to which the blood pressure measuring device is mounted, with respect to a center C of the outer case 31 of a surface 33a of the base part 33； a first pressure sensor 17A and a second pressure sensor 17B installed side by side in the circumferential direction V1 on one direction side of an orthogonal direction V2 orthogonal to the circumferential direction V1 with respect to the pump 14, of the surface 33a； and a first on-off valve 16A and a second on-off valve 16B installed side by side in the circumferential direction V1 to the first pressure sensor 17A and the second pressure sensor 17B, on the surface 33a.SELECTED DRAWING: Figure 6【課題】小型化できる血圧測定装置を提供すること。【解決手段】血圧測定装置１は、外郭ケース３１と、基部３３と、基部３３の表面３３ａの、外郭ケース３１の中心Ｃに対して、装着される生体１００の周方向Ｖ１の一方向側に設置されたポンプ１４と、表面３３ａの、ポンプ１４に対して周方向Ｖ１に直交する直交方向Ｖ２の一方向側で周方向Ｖ１に並んで設置された、第１圧力センサ１７Ａ及び第２圧力センサ１７Ｂと、表面３３ａに、第１圧力センサ１７Ａ及び第２圧力センサ１７Ｂに周方向Ｖ１に並んで設置された、第１開閉弁１６Ａ及び第２開閉弁１６Ｂと、を備える。【選択図】 図６
