PROBLEM TO BE SOLVED: To provide a blood flow measuring device including at least one AD conversion unit and processing a plurality of reflected light signals. SOLUTION: The light source unit is provided with at least one light source unit, a plurality of light receiving units, a plurality of signal processing units, at least one multiplexing unit, and at least one AD conversion unit. The living body is irradiated with coherent light, each of the plurality of light receiving units receives the reflected light reflected by the coherent light, converts the intensity of the reflected light into a current signal, and each of the plurality of signal processing units receives the reflected light. , The current signal is converted into a voltage signal, the multiplexing unit multiplexes the plurality of the voltage signals into at least one multiplexed voltage signal, and the AD conversion unit samples and multiplexes the multiplexed voltage signal. Provided is a blood flow measuring device for obtaining a digital signal. [Selection diagram] Fig. 1【課題】少なくとも一つのＡＤ変換部を備えており、複数の反射光信号を処理する血流測定装置を提供する。【解決手段】少なくとも一つの光源部と、複数の受光部と、複数の信号処理部と、少なくとも一つの多重化部と、少なくとも一つのＡＤ変換部と、を備えており、前記光源部が、コヒーレント光を生体に照射し、前記複数の受光部のそれぞれが、前記コヒーレント光が反射した反射光を受信し、前記反射光の強度を電流信号に変換し、前記複数の信号処理部のそれぞれが、前記電流信号を電圧信号に変換し、前記多重化部が、複数の前記電圧信号を少なくとも一つの多重化電圧信号に多重化し、前記ＡＤ変換部が、前記多重化電圧信号をサンプリングし、多重化デジタル信号を得る、血流測定装置を提供する。【選択図】図１
