A resin composition containing: an ester compound including a carboxylic acid ester obtained by using (1) a monohydric alcohol having an alkyl group having 1 to 4 carbon atoms; (2) a dicarboxylic acid having an alkylene group having 2 to 4 carbon atoms; and (3) a dihydric alcohol having an alkylene group having 2 to 6 carbon atoms, the ester compound having an acid value of 1.00 mgKOH/g or less, a hydroxyl value of 5.0 mgKOH/g or less, and a number-average molecular weight of from 300 to 700; and an aliphatic polyester. Since the resin composition of the present invention inhibits the generation of volatile compounds, the resin composition can be suitably used in various industrial applications, such as daily sundries, household electric appliance parts, and automobile parts.