To provide a back sheet for a solar cell, which is capable of sufficiently suppressing delamination even under a high-temperature environment while having excellent withstand voltage property.

A back sheet 200 for a solar cell includes a metal layer 30 and a crosslinked resin layer 40 laminated on the metal layer 30. The metal layer 30 is constituted of a metal material containing aluminum. The crosslinked resin layer 40 contains a crosslinked polyolefin.