The rate of chlorine-exchange reaction of antimony trichloride with benzyl, $alpha$-phenyl ethyl and diphenyl methyl chlorides in nitrobenzene have been determined. The results indicate that the chlorine-exchange reaction follows second-order kinetics with respect to antimony trichloride and first-order kinetics with respect to organic chlorides. Rate = $k_3[SbCl_3]^2$ [Org-Cl] The rate constants of chlorine-exchange of antimony trichloride with organic chloride increase in the following order of the organic chlorides. Benzyl chloride < $alpha$-phenyl ethyl chloride < diphenyl methyl chloride The mechanism of the chlorine-exchange reactions has been proposed.