To provide a solar cell module that has excellent appearance after installation, conveniently copes with rain, is compactly packed by overlapping a plurality of solar cell modules, and reduces the waste of packing materials.

This solar cell module has at least a photovoltaic element. In the solar cell module, a wall upper part projecting at the side of a light reception surface is provided at both sides. Also, in the solar cell module, when distance to the wall upper part at one end of the solar cell module is set to A, and that at the other is set to B, the wall upper part is formed so that the B is larger than A. In the assembling method of the solar cell module, the wide-side end of the solar cell module at a side in front of the solar cell module is overlapped to the narrow-side end of the solar cell module at a ridge side for arranging and fixing. In the packing method of the solar cell module, the solar cell module is shifted so that the terminal box of the solar cell module does not interfere for overlapping and packing.