The use of ultrasonicirradiation for the selective synthesis of sulfone in the oxidation of sulfides with NaIO4 catalyzed by Mn(Salophen) supported on chloromethylated polystyrene-bound imidazole, [Mn(Salophene)-PSI], is reported. This heterogeneous catalyst efficiently catalyzed selectiveoxidation of sulfides to sulfones underultrasonicirradiation and no sulfoxide was detected in the reaction