Microplate with a plurality of cells each cell having two electodes formed at the bottom thereof

A sensor comprising;multiple object housing chambers (4a);electrode sections each having at least an active electrode (2a) and a counter-electrode (2b) is formed at a bottom section of each object housing chamber (4a); andmultiple lead-out terminals (3a) for outputting measurement signals of each electrode section;and wherein the lead-out terminals (3a) are united to the object housing chambers (4a).