Abstract: This invention provides a light diffusion member for an interconnector that enables the amount of light incident on the surface of a solar cell to be increased compared with the related art and achieves excellent power generation efficiency, and an interconnector for solar cells that comprises the light diffusion member. The light diffusion member for an interconnector 3 is disposed on the surface of an interconnector 1 for connecting adjacent solar cells 6 opposite to the solar cells 6, and the light diffusion member comprises a light diffusion layer 3a containing a resin and inorganic particles.

Abstract: Provided are a back side protective sheet for a solar cell capable of enhancing adherence to an EVA resin as a filler used to seal solar cell elements and of maintaining a weather resistance over a long period of time; and a solar cell module including the back side protective sheet for a solar cell. The back side protective sheet (10) for a solar cell, which is disposed on a back side of a solar cell module, includes: a first film (11) constituted of a laminated body formed by causing a linear low-density polyethylene layer (111), an interposing resin layer (113), and a linear low-density polyethylene layer (112) to directly contact each other in order; and a second film (12) laminated on the first film (11), with an adhesive layer (13) interposed between the first film (11) and the second film (12). The interposing resin layer (113) is formed of one kind of a resin selected from the group consisting of high-density polyethylene, polypropylene, a cycloolefin polymer, and a methacrylate resin.