To provide a method for manufacturing a molding product of a polyphenylene sulfide resin composition which is composed of the polyphenylene sulfide resin composition containing a vinyl-based copolymer, and shows excellence in a low degree of a flash during molding, the stability of an optical axis of a laser focus and the uniformity of mechanical strengths.

The molded product 1 is manufactured by injection-molding the polyphenylene sulfide resin composition made by compounding the polyphenylene sulfide resin and the vinyl-based copolymer in a mold temperature range from 70 to 90°C.