An object of the present invention is to provide a method for producing sulfur-containing carboxylic acid esters that are useful for aromatizing and flavoring purpose and can cater to the needs for diversified aromatized and/or flavored products, and to further provide a fragrance and/or flavor composition comprising the ester producible by the method and an aromatized and/or flavored product comprising the same.The present invention provides a method for producing a sulfur-containing carboxylic acid ester represented by the following formula (3):(wherein R1 represents an alkyl group having 1 to 10 carbon atoms or an optionally substituted phenyl group (wherein the substituent thereof is an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms), R2 and R3 independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, or R2 and R3 together form an alkylene group, and R4 represents an alkyl group having 1 to 4 carbon atoms), the method comprising a reaction of, in the presence of an acid catalyst, an α,β-unsaturated carboxylic acid ester represented by the following general formula (1):(wherein R1, R2 and R3 have the same meanings as defined above, and the wavy line represents cis or trans configuration), with a thiocarboxylic acid represented by the following general formula (2):(wherein R4 has the same meaning as defined above).
