To charge a secondary battery incorporated in a biological signal measuring device (wearable biological sensor) without using a dedicated charging terminal.SOLUTION: The battery and its charging circuit 200 as an internal power source, the electrodes 10a, 10b which are in contact with the skin surface of the human body at the time of measuring the biological signal and connected to the predetermined power supply 2 at the time of charging the battery, the electrodes 10a, 10b A biological signal processing circuit 100 for processing the biological signal detected by the biological signal processing circuit 100 in a predetermined manner and a biosignal-power supply power distribution means 300, and the biological signal processing circuit 100 and the charging circuit 200 are connected to the electrodes 10a, 10b And is switchably connected via a signal / power supply power distribution means 300. When charging the battery, the electrodes 10a, 10b are used as charge terminals.BACKGROUND OF THE INVENTION【課題】生体信号計測器(ウェアラブル生体センサ)に内蔵されている二次電池を専用の充電端子によることなく充電できるようにする。【解決手段】内部電源としての電池およびその充電回路200と、生体信号計測時に人体の皮膚面と接触し電池の充電時には所定の給電器2に接続される電極10a,10bと、電極10a,10bにて検出される生体信号を所定に処理する生体信号処理回路100と、生体信号・給電電力振り分け手段300とを備え、電極10a,10bに対して生体信号処理回路100と充電回路200とが生体信号・給電電力振り分け手段300を介して切り換え可能に接続されており、電池の充電時には電極10a,10bを充電用端子として用いる。【選択図】図1
