PROBLEM TO BE SOLVED: To correct a waveform error of a measured volume pulse wave in a period in which a blood flow temporarily changes. A measuring device includes a first photoelectric sensor (30) for measuring a first volume pulse wave according to a volume change of a vein and a second photoelectric sensor for measuring a second volume pulse wave according to a volume change of an artery of a subject. The sensor 35 and the arithmetic processing unit 41 AC-coupled to these sensors are provided. The arithmetic processing unit decreases the highest point of each heartbeat of the first volume pulse wave when the increasing/decreasing tendency of the highest point of each heartbeat of the two volume pulse waves is reversed, and the second volume pulse wave is decreased. In the first period in which the highest point of each heartbeat of the pulse wave rises, a first correction process of correcting the waveform of the first volume pulse wave is executed so that the lowest point of each heartbeat decreases with time. During the second period in which the highest point of each heartbeat of the first volume pulse wave rises and the highest point of each heartbeat of the second volume pulse wave decreases, the lowest point of each heartbeat rises with respect to time. A second correction process for correcting the waveform of the first volume pulse wave is executed. [Selection diagram] Fig. 5【課題】測定される容積脈波について、血流量が一時的に変化した期間の波形誤差を補正する。【解決手段】測定装置は、静脈の容積変化に応じた第１容積脈波を測定する第１光電センサ３０と、被験者の動脈の容積変化に応じた第２容積脈波を測定する第２光電センサ３５と、これらセンサに対してＡＣカップリングされた演算処理部４１とを備える。前記演算処理部は、前記２つの容積脈波について、各心拍の最高点の増減の傾向が逆になった場合、前記第１容積脈波の各心拍の最高点が低下し、前記第２容積脈波の各心拍の最高点が上昇する第１期間は、各心拍の最低点が時間に対して低下するように、前記第１容積脈波の波形を補正する第１補正処理を実行し、前記第１容積脈波の各心拍の最高点が上昇し、前記第２容積脈波の各心拍の最高点が低下する第２期間は、各心拍の最低点が時間に対して上昇するように、前記第１容積脈波の波形を補正する第２補正処理を実行する。【選択図】図５
