The present invention relates to a method of producing organic acids, comprising biochemical synthesis of organic acid-CoA using acetyl-CoA as a substrate and conducting CoA elimination reaction of the organic acid-CoA using CoA transferase in the presence of acetic acid, in which organic acid is obtained by culturing transformed microorganisms which have an enzyme gene cluster for the synthesis of organic acid-CoA using acetyl-CoA as a substrate and a CoA transferase gene.