(A) unsaturated polyester resin 100 parts by weight, (B) (1) acrylic acid esters, methacrylic acid esters, and aromatic vinyl compound resin containing not less than 50% by weight of a monomer unit of at least one member selected from the group powder consisting of, or (2) a glass transition point of not more than -30 ℃ acrylic acid ester or methacrylic acid ester-based polymer and / or a diene and a core portion made of a polymer, acrylic acid ester or methacrylic acid ester monomer and a synthesis of the radicals with the free carboxyl group the unsaturated carboxyl monomer and the glass transition point of the air-core / syelhyeong consisting syelcheung formed of the copolymer less than 70 ℃ polymer particles, a thickener of a copolymer resin powder having ion cross-linking by adding a metal cation, as an active ingredient, 20-120 parts by weight , (C) 30 to 120 parts by weight of the monomer liquid, (D) a curing agent can be an unsaturated polyester molding made in containing In the composition, (E) that, an unsaturated polyester resin composition of the present invention relates to a molding method according to the low temperature and low pressure of the SMC and BMC, and the SMC and BMC produced by blending a reinforcing material is, the SMC mad possible in a short period of time, in addition, SMC hwahan, storage stability is good, and can be formed of a low temperature and low pressure, the low shrinkage and the excellent surface smoothness, the strength and elastic modulus can be obtained a large molded product.