A biosignal measurement apparatus (10) that is used by being affixed on a living body is provided with: an affixed part (115) that is a sheet, in which a signal-acquiring section (110) of multiple electrodes and wiring connected to each of the electrodes are formed, and which can be freely expanded, contracted and bent and is adhesive； and a substrate (500) that is connected to the wiring and on which a signalprocessing circuit for wirelessly transmitting biosignals obtained through the wiring is mounted. The signal-acquiring section (110) is exposed on the surface of the affixed part (115) and the affixed part (115) and the substrate (500) are stacked so that the back surface of the affixed part (115) faces the substrate.
