A blood pressure measurement device is equipped with a pressing surface 6b which is formed with an element array of plural pressure sensors 6a arranged in one direction and an element array of plural pressure sensors 7a arranged in the one direction, an air bag 2 for pressing the pressing surface 6b against a living body, a control unit 12 for calculating blood pressure values in a radius artery T on the basis of pressure pulse waves that are detected by the pressure sensors 6a and 7a in a state that the pressing surface 6b is pressed against the living body by the air bag 2, and a rotational drive unit 10 for performing driving to rotate the pressing surface 6b about each of axes X and Y that are perpendicular to a pressing direction of the air bag 2.
