PROBLEM TO BE SOLVED: To provide a blood flow rate measurement device which is simple and has a high flexibility of measurement.SOLUTION: A blood flow rate measurement device 100 comprises: a pulse wave signal generation part which optically detects the peripheral arterial wave of a living body and generates an electrical pulse wave signal； an amplification part which separates an AC component from the pulse wave signal to amplify and output the AC component； an AC conversion part which samples the AC component of the pulse wave signal at a predetermined time interval to convert the AC component to a digital signal； and an arithmetic operation part 1 which calculates the blood flow rate IPV of the living body on the basis of the integrated value iPVac of the sampling value PVac of the AC component of the pulse wave signal.SELECTED DRAWING: Figure 1【課題】簡単且つ計測の自由度の高い血流量計測装置を提供する。【解決手段】血流量測定装置１００は、生体の末梢動脈波を光学的に検出し、電気的な脈波信号を生成する脈波信号生成部と、脈波信号から交流成分を分離し、増幅して出力する増幅部と、脈波信号の交流成分を所定の時間間隔でサンプリングし、デジタル信号に変換するＡ／Ｄ変換部と、脈波信号の交流成分のサンプリング値ＰＶａｃの積算値ｉＰＶａｃに基づいて、生体の血流量ＩＰＶを算出する演算部１とを有する。【選択図】図１
