An image pickup device comprising: a plurality of first electrodes that is arranged on an upper side of a substrate in two dimensions with a gap interposed between one of the first electrodes and another first electrode adjacent to the one of the first electrode; a second electrode that is arranged next to the first electrodes arranged on an outermost side of the first electrodes with the gap interposed between the first electrodes arranged on the outermost side and the second electrode; a third electrode that faces both of the plurality of first electrodes and the second electrode; a photoelectric conversion layer that is disposed between the plurality of first electrodes and the second electrode on the one side and the third electrode on the other side; a plurality of signal reading portions that is connected to the plurality of first electrodes and is configured to read out signals corresponding to electric charge that is generated in the photoelectric conversion layer and moved to the plurality of first electrodes; and at least one of electric potential adjusting portions that is connected to the second electrode and configured to adjust an electric potential of the second electrode such that the electric potential of the second electrode determined in accordance with electric charge that is generated in the photoelectric conversion layer and moved to the second electrode is not beyond a predetermined range; characterized in that the at least one of electric potential adjusting portions is a wiring that directly connects the second electrode and a power source wherein the at least one of the electric potential adjusting portions is configured to fix an electric potential of the second electrode to a fixed voltage all the time, is a diode-connected transistor that has a gate terminal and a drain terminal connected together, that is connected with the drain terminal to the second electrode and with a source terminal to a power source, wherein the at least one of the electric potential adjusting portions is configured to prevent the electric potential of the second electrode being equal to or higher than a threshold value being the sum of a fixed source voltage applied by the power source and a threshold voltage (Vt) of the diode-connected transistor, or is a diode connected with its cathode to the second electrode and its anode to a power source, wherein the at least one of the electric potential adjusting portions is configured to prevent the electric potential of the second electrode being equal to or higher than a threshold value being the sum of a fixed anode voltage applied by the power source and a breakdown voltage of the diode. a plurality of first electrodes that is arranged on an upper side of a substrate in two dimensions with a gap interposed between one of the first electrodes and another first electrode adjacent to the one of the first electrode; a second electrode that is arranged next to the first electrodes arranged on an outermost side of the first electrodes with the gap interposed between the first electrodes arranged on the outermost side and the second electrode; a third electrode that faces both of the plurality of first electrodes and the second electrode; a photoelectric conversion layer that is disposed between the plurality of first electrodes and the second electrode on the one side and the third electrode on the other side; a plurality of signal reading portions that is connected to the plurality of first electrodes and is configured to read out signals corresponding to electric charge that is generated in the photoelectric conversion layer and moved to the plurality of first electrodes; and at least one of electric potential adjusting portions that is connected to the second electrode and configured to adjust an electric potential of the second electrode such that the electric potential of the second electrode determined in accordance with electric charge that is generated in the photoelectric conversion layer and moved to the second electrode is not beyond a predetermined range; characterized in that the at least one of electric potential adjusting portions is a wiring that directly connects the second electrode and a power source wherein the at least one of the electric potential adjusting portions is configured to fix an electric potential of the second electrode to a fixed voltage all the time, is a diode-connected transistor that has a gate terminal and a drain terminal connected together, that is connected with the drain terminal to the second electrode and with a source terminal to a power source, wherein the at least one of the electric potential adjusting portions is configured to prevent the electric potential of the second electrode being equal to or higher than a threshold value being the sum of a fixed source voltage applied by the power source and a threshold voltage (Vt) of the diode-connected transistor, or is a diode connected with its cathode to the second electrode and its anode to a power source, wherein the at least one of the electric potential adjusting portions is configured to prevent the electric potential of the second electrode being equal to or higher than a threshold value being the sum of a fixed anode voltage applied by the power source and a breakdown voltage of the diode.