PROBLEM TO BE SOLVED: To provide a blood pressure measuring device capable of making a case thin. A blood pressure measurement device (1) includes a case (11), a belt (4), a cuff structure (6), a pump (14), a power supply section (18) and a flow path section (15), and a power supply section (18) housed in the case (11). The double-sided tape 38 provided on the edge portion of the surface 18 a facing the pump 14 and the pump 14 and the power supply unit 18 provided in the flow path section 15 in the case 11 in the direction orthogonal to the axial direction of the outer case 31. The opening/closing valve 16 arranged at a position away from the outer casing 31 and the first opening end 31d formed in the outer casing 31 on the inner surface of the outer casing 31 form a gap S between the pump 14 and the power supply unit 18, And a hole 31c arranged at the same position in the axial direction of the outer case 31. [Selection diagram]【課題】ケースを薄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、ケース１１と、ベルト４と、カフ構造体６と、ケース１１内に収容される、ポンプ１４、電力供給部１８及び流路部１５と、電力供給部１８のポンプ１４に対向する面１８ａの縁部に設けられる両面テープ３８と、流路部１５に設けられ、ケース１１内の、外郭ケース３１の軸方向に直交する方向でポンプ１４及び電力供給部１８と離れた位置に配置される開閉弁１６と、外郭ケース３１に形成され、外郭ケース３１の内面に配置される第１開口端３１ｄが、ポンプ１４及び電力供給部１８の間の隙間Ｓと、外郭ケース３１の軸方向で同位置に配置される孔３１ｃと、を備える。【選択図】 図１０
