An electronic sphygmomanometer, which measures blood pressure in accordance with the volume compensation method, detects a cuff pressure inside a cuff attached to a measurement site of the blood pressure. An arterial volume detection circuit detects an arterial volume signal of the measurement site. A drive control unit, after setting the cuff pressure to an initial cuff pressure, servo-controls a cuff pressure adjustment unit so that a volume of an artery becomes constant, based on the detected arterial volume signal. While the servo control is being performed, an arterial volume change amount is detected based on the detected arterial volume signal. In the servo control, when it is detected that the change amount in the arterial volume is minimal, a volume change elimination rate calculating unit calculates a volume change elimination rate (an amplitude of the arterial volume signal during the control/an amplitude of the arterial volume signal before the control) to output the same as a barometer of arteriosclerosis.
