It is intended to provide a polymer alloy including a polyphenylene sulfide resin, a polyphenylene ether resin, and a talc, which is excellent in a balance between tenacity (impact strength) and rigidity and in die wear resistance. The present invention provides a resin composition including 45 to 99 parts by weight of a polyphenylene sulfide resin (a), 55 to 1 part(s) by weight of a polyphenylene ether resin (b), 1 to 20 part(s) by weight of a compatibilizer (c) with respect to 100 parts by weight in total of the components (a) and (b), and 20 to 200 parts by weight of a talc (d) having an average particle size of 25 to 100 .mu.m or 20 to 200 parts by weight in total of a talc (d) having an average particle size of 25 to 100 .mu.m and a fibrous filler (e) with respect to 100 parts by weight in total of the components (a) and (b).