Resin composition and molded product

A resin composition comprising:

• a (A) polyethylene terephthalate resin;
• a (B) polyphenylene ether resin;
• a (C) styrenic thermoplastic elastomer;
• and
• a (D) styrenic copolymer having a glycidyl group,
• wherein, relative to a total of 100 parts by mass of the (A) polyethylene terephthalate resin, the (B) polyphenylene ether resin, the (C) styrenic thermoplastic elastomer and the (D) styrenic copolymer having the glycidyl group,
• an amount of the (A) polyethylene terephthalate resin is 40 to 90 parts by mass,
• an amount of the (B) polyphenylene ether resin is 5 to 55 parts by mass,
• an amount of the (C) styrenic thermoplastic elastomer is 3 to 20 parts by mass,
• an amount of the (D) styrenic copolymer having the glycidyl group is 0.1 to 5 parts by mass, and
• when CA represents a mass of the (C) styrenic thermoplastic elastomer present in a phase of the (A) polyethylene terephthalate resin;
• CB represents a mass of the (C) styrenic thermoplastic elastomer present in a phase of the (B) polyphenylene ether resin;
• Am represents a mass of the (A) polyethylene terephthalate resin in the resin composition;
• and
• Bm represents a mass of the (B) polyphenylene ether resin in the resin composition,
• a relationship between a mass ratio of CA/CB and a mass ratio of Am/Bm satisfies 0.05≤[CA/CB]/[Am/Bm]≤0.90, and
• an average particle diameter of the phase of the (B) polyphenylene ether resin dispersed in the phase of the (A) polyethylene terephthalate resin is 0.1 to 5 μm.