PROBLEM TO BE SOLVED: To provide a blood pressure measuring device capable of improving accuracy of measuring blood pressure as biological information, by flexibly changing a state of contact between a biological region and a sensor unit to be used in contact with the biological region.SOLUTION: A blood pressure measuring device comprises: a pressing surface 6b on which an element row composed of a plurality of pressure sensors 6a arranged in one direction and an element row composed of a plurality of pressure sensors 7a arranged in one direction are formed； an air bag 2 for pressing the pressing surface 6b on a living body； a control unit for calculating a blood pressure value in a radial artery on the basis of a pressure pulse wave detected by the pressure sensors 6a, 7a in a state in which the pressing surface 6b is pressed on the living body by the air bag 2； and a rotation drive unit for performing driving to rotate the pressing surface 6b around each of an axis X and axis Y that are orthogonal to the air bag 2's pressing direction.SELECTED DRAWING: Figure 2【課題】生体部位に接触させて用いるセンサ部の生体部位との接触状態を柔軟に変更して生体情報としての血圧の測定精度を向上させることのできる血圧測定装置を提供する。【解決手段】血圧測定装置は、一方向に並ぶ複数の圧力センサ６ａからなる素子列と一方向に並ぶ複数の圧力センサ７ａからなる素子列が形成された押圧面６ｂと、押圧面６ｂを生体に押圧する空気袋２と、空気袋２により押圧面６ｂを生体に押圧した状態で圧力センサ６ａ，７ａにより検出される圧脈波に基づいて、橈骨動脈内の血圧値を算出する制御部と、空気袋２による押圧方向に直交する軸Ｘと軸Ｙの各々の周りに押圧面６ｂを回転させる駆動を行う回転駆動部と、を備える。【選択図】図２
