Prepreg, fiber-reinforced composite material, and molded article

A prepreg comprising:

• carbon fibers;
• and
• a resin composition comprising
• an epoxy resin (A) having a biphenyl structure and two or more epoxy groups,
• an epoxy resin (B) having two or more epoxy groups and having no biphenyl structure,
• a curing agent, and
• melamine cyanurate,
• wherein
• a content of chlorine atoms in the resin composition is 1% by mass or less,
• a content of phosphorus atoms in the resin composition is 0.1% by mass or less,
• a content of the epoxy resin (A) with respect to the total amount of the epoxy resin (A) and the epoxy resin (B) is 20% by mass or more and 40% by mass or less,
• the total amount of the epoxy resin (A) and the epoxy resin (B) is 60% by mass or more and 75% by mass or less based on the total amount of the resin composition,
• a content of the melamine cyanurate is 25% by mass or more and 40% by mass or less based on the total amount of the resin composition,
• a content of the carbon fibers in the prepreg is 20% by mass or more and 90% by mass or less, and
• the epoxy resin (A) comprises an epoxy resin represented by the formula (A-1):
• wherein n is an integer of 1 or more.