A resin concrete composition and its molded article are provided, the resin concrete, even with a reduced resin content, having an excellent flowability, which is an important property in a molding operation, and necessitating no shrinkage reduction agent, and the molded article having no cracks and being highly strong. The resin concrete composition comprises (A) a resin composition containing (a) an unsaturated polyester of an unsaturated acid, a di- and/or trialkylene glycol, and dicyclopentadiene and (b) a polymerizable unsaturated monomer, (B) an aggregate, and (C) a filler.
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