A solar cell module comprising: a solar cell including a plurality of light receiving surface side fine-line electrodes formed on a light receiving surface, and a plurality of back surface side fine-line electrodes formed on a back surface opposite to the light receiving surface; a first wiring member connected onto the light receiving surface and connected to the plurality of light receiving surface side fine-line electrodes; and a second wiring member connected onto the back surface and connected to the plurality of back surface side fine-line electrodes, wherein the first wiring member includes a conductive first core, and a conductive first covering layer formed on a surface of the first core, and the second wiring member includes a conductive second core, and a conductive second covering layer formed on a surface of the second core, wherein a line width (α1) of the plurality of light receiving surface side fine-line electrodes is smaller than a line width (β1) of the plurality of back surface side fine-line electrodes, the plurality of light receiving surface side fine-line electrodes have a plurality of first connection portions (30A CON) connected to the first wiring member by biting into the first covering layer, the plurality of back surface side fine-line electrodes have a plurality of second connection portions (30B CON) connected to the second wiring member by biting into the second covering layer, a total area of the plurality of first connection portions (30A CON) is smaller than a total area of the plurality of second connection portions (30B CON) in a plan view, and an interval (ε1) between the light receiving surface and the surface of the first core is substantially the same as an interval (ε2) between the back surface and the surface of the second core characterized in that a height (α2) of the plurality of light receiving surface side fine-line electrodes is larger than a height (β2) of the plurality of back surface side fine-line electrodes, and the number of the plurality of light receiving side fine-line electrodes is smaller than the number of the plurality of back surface side fine-line electrodes, and further characterized in that a biting depth (δ1) of the plurality of first connection portions in the first covering layer is larger than a biting depth (δ2) of the plurality of second connection portions in the second covering layer. a solar cell including a plurality of light receiving surface side fine-line electrodes formed on a light receiving surface, and a plurality of back surface side fine-line electrodes formed on a back surface opposite to the light receiving surface; a plurality of light receiving surface side fine-line electrodes formed on a light receiving surface, and a plurality of back surface side fine-line electrodes formed on a back surface opposite to the light receiving surface; a first wiring member connected onto the light receiving surface and connected to the plurality of light receiving surface side fine-line electrodes; and a second wiring member connected onto the back surface and connected to the plurality of back surface side fine-line electrodes, wherein the first wiring member includes a conductive first core, and a conductive first covering layer formed on a surface of the first core, and a conductive first core, and a conductive first covering layer formed on a surface of the first core, and the second wiring member includes a conductive second core, and a conductive second covering layer formed on a surface of the second core, a conductive second core, and a conductive second covering layer formed on a surface of the second core, wherein a line width (α1) of the plurality of light receiving surface side fine-line electrodes is smaller than a line width (β1) of the plurality of back surface side fine-line electrodes, the plurality of light receiving surface side fine-line electrodes have a plurality of first connection portions (30A CON) connected to the first wiring member by biting into the first covering layer, the plurality of back surface side fine-line electrodes have a plurality of second connection portions (30B CON) connected to the second wiring member by biting into the second covering layer, a total area of the plurality of first connection portions (30A CON) is smaller than a total area of the plurality of second connection portions (30B CON) in a plan view, and an interval (ε1) between the light receiving surface and the surface of the first core is substantially the same as an interval (ε2) between the back surface and the surface of the second core characterized in that a height (α2) of the plurality of light receiving surface side fine-line electrodes is larger than a height (β2) of the plurality of back surface side fine-line electrodes, and the number of the plurality of light receiving side fine-line electrodes is smaller than the number of the plurality of back surface side fine-line electrodes, and further characterized in that a biting depth (δ1) of the plurality of first connection portions in the first covering layer is larger than a biting depth (δ2) of the plurality of second connection portions in the second covering layer.