A method has been developed for the synthesis of radioactive Dichlorodiphenyltrichloroethane (DDT) in good yield in which the tertiary carbon is labeled. Fields et al. have developed a satisfactory procedure for incorporating C(14) in the benzene ring. This procedure presumably was employed in a previously reported labeling of DDT with C(14). However, the complete synthesis of DDT by this procedure would involve at least seven major steps, with the consequent tendency towards low over-all yields. In the authors' procedure, only four major steps are necessary.