A package configuration of a solar cell has a glass substrate having a solar cell element formed on the surface opposite to the light-receiving surface thereof, a backplate disposed across an empty space from the surface of the glass substrate opposite to the light receiving surface thereof, a frame connecting the glass substrate and the backplate to each other along the peripheries thereof, a sealing resin layer sealed inside the peripheries of the backplate and the frame so as to isolate the empty space from the atmosphere, a layer of desiccant disposed inside the backplate so as to adsorb moisture penetrating into the empty space, and conductor wires for externally collecting electric energy generated by the solar cell element.