The light receiving element 10 on the light-emitting elements 8, 9 for detecting an optical detection signal in accordance with the photoelectric pulse wave signal, the light and transmitting the ECG electrodes 19 for detecting an electric signal related to the ECG signal by capacitive coupling I providing a light transmitting insulating film 20. When the user is brought into contact with the contact surface 20A of the light transmitting insulating film 20 and the finger, and detects the electrical signal related to the ECG signal by 19 light-transmitting ECG electrodes, the user from the light emitting elements 8 and 9 and detecting the light detection signals received by the light receiving element 10 to the reflected light of the detection light applied to the finger, corresponding to the reflected light. Then, the obtained electrocardiographic signal from the electric signal or the like is detected from the light-transmitting ECG electrode 19, with the photoelectric pulse wave signal from the light detection signal, and generates the biometric information by the photoelectric pulse wave signal and the ECG signal are to.光電脈波信号に係る光検出信号を検出するための発光素子8,9および受光素子10上に、容量性結合により心電信号に係る電気信号を検出するための光透過性心電電極19および光透過性絶縁膜20を設ける。利用者が指を光透過性絶縁膜20の接触面20Aに接触させたとき、光透過性心電電極19により心電信号に係る電気信号を検出すると共に、発光素子8,9から利用者の指に照射した検出光の反射光を受光素子10により受光し、この反射光に対応する光検出信号を検出する。そして、光透過性心電電極19から検出した電気信号等から心電信号を得ると共に、光検出信号から光電脈波信号を得て、これら心電信号と光電脈波信号とにより生体情報を生成する。
