Disclosed is a low-melting glass which has excellent water resistance and can impart excellent flame retardancy to a resin composition. Also disclosed is a resin composition comprising the low-melting glass. Further disclosed is a resin molded article.Specifically disclosed is a low-melting glass which comprises 22-27 mol% of P2O5, 3-18 mol% of SO3, 25-40 mol% of ZnO, 0-2 mol% of Al2O3, 0-4 mol% of Li2O, 0-15 mol% of Na2O and 11-35 mol% of K2O, wherein the total amount of Li2O, Na2O and K2O is 25-35 mol%. The low-melting glass has a glass transition temperature of 200 to 300°C exclusive. A resin composition is produced by mixing the low-melting glass with a resin. A resin molded article is produced by molding or curing the resin composition.
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