The biological signal measuring device (10) used by being attached to a living body is formed with a signal acquisition unit (110) that is a plurality of electrodes and wirings connected to each of the electrodes, and can be expanded and contracted, and is flexible. The signal acquisition unit comprising: a pasting unit (115) that is a sheet having a substrate (500) on which a signal processing circuit that is connected to the wiring and wirelessly transmits a biological signal obtained through the wiring is mounted； (110) is exposed on the surface of the sticking part (115), and the sticking part (115) and the substrate (500) are arranged such that the back surface of the sticking part (115) and the substrate face each other. Is superimposed on.生体に貼り付けて用いられる生体信号計測装置（１０）は、複数の電極である信号取得部（１１０）及びそのそれぞれと接続される配線が形成され、伸縮及び屈曲自在で、かつ、粘着性を有するシートである貼付部（１１５）と、前記配線に接続され、前記配線を介して得られる生体信号を無線で送信する信号処理回路が実装された基板（５００）とを備え、前記信号取得部（１１０）は、前記貼付部（１１５）の表面に露出しており、前記貼付部（１１５）と前記基板（５００）とは、前記貼付部（１１５）の裏面と前記基板とが対向するように重ねられる。
