Liquid crystal polyester resin composition, method for producing same and molded body of same

A liquid crystal polyester resin composition, comprising:

• a liquid crystal polyester resin;
• and
• sizing-agent-coated carbon fibers, wherein
• an amount of the sizing-agent-coated carbon fibers relative to 100 parts by mass of the liquid crystal polyester resin is 5 parts by mass to 120 parts by mass,
• an adhesion amount of a sizing agent to carbon fibers in the sizing-agent-coated carbon fibers relative to 100 parts by mass of the carbon fibers is 0.1 parts by mass to 1.2 parts by mass,
• the liquid crystal polyester resin composition is a pellet in which the sizing-agent-coated carbon fibers are hardened with the liquid crystal polyester resin,
• the carbon fibers are arranged to be parallel to a longitudinal direction of the pellet and have a length identical to a length of the pellet, and
• when the sizing-agent-coated carbon fibers are heated in air from 25° C. to 400° C. at a temperature-increase rate of 50° C./min, a mass loss rate of the sizing-agent-coated carbon fibers within a range of 300° C. to 400° C. is less than 0.8% by mass, the mass loss rate being determined by an equation:
• the mass loss rate(% by mass)=(W300−W400)/W300×100
• wherein W300 is a mass of the sizing-agent-coated carbon fibers measured at 300° C. and W400 is a mass of the sizing-agent-coated carbon fibers measured at 400° C.