Disclosed is a back sheet for solar cells including a supporter and an A layer including at least a nonionic surfactant which has an ethylene glycol chain but does not have a carbon-carbon triple bond on at least one surface side of the supporter, in which the surface resistance value SR on the side provided with the A layer is in a range of 1.0×10
10
Ω/□ to 5.5×10
15
Ω/□, and the improvement of the partial discharge voltage and the adhesiveness to an encapsulating material that encapsulates a solar cell are both achieved and a solar cell module including the back sheet for solar cells.
Chlebicki,J., Roczniki Chemii, 1974, vol. 48, p. 1241 - 1253