PROBLEM TO BE SOLVED: To provide a blood pressure measuring device capable of measuring Korotkoff sound based on the same contraction of the heart measured at a plurality of sites and measuring Korotkoff sound even at only a part of position to measure blood pressure. .. SOLUTION: First and second main rubber sac 1A and 1B as a plurality of artery compression sac for compressing an artery and first and second main rubber sac 1A and 1B via conduits 1C and 1D, respectively. First and second auxiliary rubber sac 2A, 2B as a plurality of Korotkoff sound measurement sac that are respectively connected, and microphones 3A, 3B connected to the first and second auxiliary rubber sac 2A, 2B, respectively. The pressure supply pipes 1E and 1F respectively connected to the first and second main rubber sac 1A and 1B, the electromagnetic air valves 11A and 11B provided in the middle of the pressure supply pipes 1E and 1F, and the electromagnetic air valves 11A and 11B, respectively. It has a CPU 7 that can open and close the first and second main rubber sac 1A and 1B simultaneously or can pressurize and depress only a specific main rubber sac. [Selection diagram] Figure 1【課題】複数部位で測定された心臓の同一収縮に基づくコロトコフ音を測定することが可能であるとともに、一部位のみでもコロトコフ音を測定して血圧を測定することが可能な血圧測定装置の提供。【解決手段】動脈を圧迫する複数の動脈圧迫用嚢としての第１、第２主ゴム嚢１Ａ，１Ｂと、第１、第２主ゴム嚢１Ａ，１Ｂにそれぞれ導管１Ｃ，１Ｄを介して１つずつ接続される複数のコロトコフ音測定用嚢としての第１、第２副ゴム嚢２Ａ，２Ｂと、第１、第２副ゴム嚢２Ａ，２Ｂにそれぞれ接続されたマイクロホン３Ａ，３Ｂと、第１、第２主ゴム嚢１Ａ，１Ｂにそれぞれ接続される圧力供給管１Ｅ，１Ｆと、圧力供給管１Ｅ，１Ｆの途中にそれぞれ設けられる電磁エアーバルブ１１Ａ，１１Ｂと、電磁エアーバルブ１１Ａ，１１Ｂをそれぞれ開閉することにより第１、第２主ゴム嚢１Ａ，１Ｂを同時に、または特定の主ゴム嚢のみを加減圧可能とするＣＰＵ７とを有する。【選択図】図１
