Back protection sheet for solar cell and solar cell module including the same

Provided are a back side protective sheet for a solar cell, which is capable of enhancing adherence to an EVA resin as a filler used to seal solar cell elements and of preventing yellow discoloration 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 is a back side protective sheet for a solar cell disposed on a back side of a solar cell module (100) and includes: a first film (11) containing linear low-density polyethylene having a density greater than or equal to 0.91 g/cm 3 and less than or equal to 0.93 g/cm 3 and an inorganic ultraviolet absorbing agent; and a second film (12) being laminated on the first film (11), with a urethane adhesive layer (13) being interposed therebetween. An average particle diameter of the inorganic ultraviolet absorbing agent is greater than or equal to 0.1 µm and less than or equal to 5 µm. The first film (11) contains the inorganic ultraviolet absorbing agent gre