To provide a sphygmomanometer capable of notifying a person to be measured the degree of wear of a battery without using a pseudo load.SOLUTION: The blood pressure monitor (10) comprises a cuff (50), a pressurizing pump (23) for inflating gas by flowing gas into the cuff, a solenoid valve (27) for exhausting gas in the cuff, A battery (70) constituting a parallel circuit together with a pressurizing part and a solenoid valve, a drive control part (41) for driving a pressurizing part and a solenoid valve, a battery terminal A voltage measuring section (45) for measuring an inspection driving voltage which is a voltage, a voltage measuring section (45) for measuring a test driving voltage which is a voltage, a blood pressure as a terminal voltage of a battery when trying to drive a pressurizing section and a solenoid valve A display unit (21) for notifying that the terminal voltage of the battery is insufficient for blood pressure measurement when the predicted blood pressure measurement voltage is less than a predetermined voltage and a voltage estimation unit .(FIG.【課題】擬似負荷を用いることなく、電池の消耗度合いを被測定者に通知可能な血圧計を提供する。【解決手段】血圧計(10)は、カフ(50)と、カフに気体を流入させて加圧する加圧ポンプ(23)と、カフ内の気体を排気する為の電磁弁(27)と、加圧部及び電磁弁とともに並列回路を構成する電池(70)と、加圧部及び電磁弁を駆動する駆動制御部(41)と、加圧部又は電磁弁を検査駆動したときの電池の端子電圧である検査駆動電圧を計測する電圧計測部(45)と、検査駆動電圧に基づいて、血圧測定を行う為に加圧部及び電磁弁を駆動しようとした際の電池の端子電圧である血圧測定電圧を予測する電圧予測部(46)と、予測された血圧測定電圧が所定電圧未満の場合、電池の端子電圧が血圧測定を行う為に不十分なことを報知する表示部(21)と、を有する。【選択図】図2
