PPS film excelling in heat resistance and hydrolysis resistance is used in at least a portion of a seal film for solar cell to thereby not only reinforce the seal film in deterioration by external environment but also inhibit deterioration of the gas barrier property thereof by long-term use having been a problem of the prior art so as to attain environment resisting properties (resistances to heat, hydrolysis, weather, chemical, etc.) of good balance, realizing a seal film markedly excelling in long-term reliability. Further, there is provided a solar cell module utilizing the seal film. Theseal film for solar cell module is one comprising a resin film layer having a layer of biaxially oriented film consisting of a resin composition composed mainly of poly-p-phenylene sulfide and comprising a gas barrier layer constituted of at least one member selected from the group consisting of a metal, a metal oxide, an inorganic compound and an organic compound, wherein the longitudinal and width direction heat shrink ratios at 150 DEG C of the seal film for solar cell module both fall within the range of -2.0% to +2.0%, and wherein the absolute value of any difference between the longitudinal and width direction heat shrink ratios at 150 DEG C is 2.0% or below.