An electrode array for analyzing electrical characteristics of a cell spheroid has a substrate, a groove formed concavely on a top surface of the substrate to receive at least a portion of the cell spheroid, and a plurality of electrodes formed in the substrate, coming into contact with the cell spheroid, and configured to apply or collect electrical signals. Front ends of the plurality of electrodes extend to the groove to form a holding part for holding the cell spheroid, and the cell spheroid is held in the holding part and comes into contact with the plurality of electrodes simultaneously.