For the chlorination of aniline salt to synthesize 2,4,6-trichloroaniline in the solvent of chloroform, the reaction mechanism was suggested and the reaction kinetics was examined. The reaction rate constants were esti-mated by using the experimental results obtained in the range of 10-40℃ and the equations of reaction rates, which were derived from the reaction mechanism. The results calculated by applying the reaction constants to the theoretical equations of reaction rates were well agreed with experimental results. The reaction rate of formation of 2,4,6-trichloro-aniline from aniline salt is 9 times greater than that of 2,6-dichloroaniline, and the activation energies of these two reactions are almost same. Thereforem the increase of 2,4,6-trichloroaniline yield cannot be expected by controlling the reaction temperature, and the obtainable maximum yield of 2,4,6-trichloroaniline is about 90%.