A polyphenylene sulfide resin composition includes (A) a polyphenylene sulfide resin containing (a1) an oxidatively crosslinked polyphenylene sulfide resin with a non-Newtonian viscosity index of 1.15 to less than 1.30 and a melt viscosity of 20 Pas to less than 40 Pas at 300.degree. C. and 1216 second.sup.-1, and (a2) an oxidatively crosslinked polyphenylene sulfide resin with a non-Newtonian viscosity index of 1.30 to less than 1.45 and a melt viscosity of 40 Pas to less than 60 Pas at 300.degree. C. and 1216 second.sup.-1; (B) a fiber reinforcement; and (C) a non-fiber reinforcement is excellent in the resistance against chemicals such as fuel.