Liquid crystalline polyester and molded article thereof

A liquid crystalline polyester resin composition comprising:

• 50 to 80% by volume of a liquid crystalline polyester (A) having a structural unit represented by the formula (I) shown below, a structural unit represented by the formula (II) shown below and a structural unit represented by the formula (iii) shown below, wherein the polyester (A) contains 40% by mol or more of a 2,6-naphthalenediyl group on the basis of 100% by mol of the total of a divalent aromatic group represented by Ar1, a divalent aromatic group represented by Ar2 and a divalent aromatic group represented by Ar3, also has a flow initiation temperature of 280° C. or higher and shows a melt tension of 1 g or more measured at a temperature higher than the flow initiation temperature;
• and
• 20 to 50% by volume of a filler (B) comprising a high dielectric material:
• wherein Ar1 represents a divalent aromatic group selected from the group consisting of a 2,6-naphthalenediyl group, a 1,4-phenylene group and a 4,4′-biphenylene group, Ar2 and Ar3 each independently represents a divalent aromatic group selected from the group consisting of a 2,6-naphthalenediyl group, a 1,4-phenylene group, a 1,3-phenylene group and a 4,4′-biphenylene group, and one or some hydrogen atoms bonded to an aromatic group represented by Ar1, Ar2 or Ar3 may be substituted with a halogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 20 carbon atoms.