A photoelectric conversion device may effectively prevent an electrolyte from leaking and have a high durability. A photoelectric conversion device includes a first substrate and a second substrate spaced from the first substrate. A plurality of first electrodes are on a side of the first substrate facing the second substrate and extend from a sealing region of the first substrate, and the first electrodes are spaced from each other. A protective layer is on the first electrodes, and an end portion of the protective layer on the sealing region extends continuously across at least two of the first electrodes.