Blood pressure data read from a storage unit is displayed using a blood pressure level bar divided into rectangular segments, and a numerical value of data in a display unit. During the blood pressure measurement, the blood pressure level bar and the numerical value are displayed according to the rise and fall of the detected blood pressure in the display unit. A reference value for determining high blood pressure is displayed in association with the blood pressure level bar. The person to be measured can grasp the blood pressure section to which the measured blood pressure corresponds based on the reference value. The person to be measured can readily grasp the transition of the blood pressure value with the blood pressure level bar even if the size of the display region of the display unit is small.
