This study, reports on ozone catalytic oxidation of dimethyl sulfide; a major odor material of waste water facilities. Xenon excimer lamp (XEL) was used for ozone generation, and iodine compounds (I- and IO3-) were utilized as a catalyst. Three types of activated carbon, activated carbon impregnated with iodine compounds and sulfate (AC-I/S), activated carbon impregnated with iodine (AC-I) and activated carbon without impregnation (AC) were tested as catalysts. Only AC-I/S had catalytic activity in the dynamic adsorption experiment. Breakthrough time of dimethyl sulfide was increased by 10 times by adding ozone in AC-I/S. Catalyst characterization by pH measurement and XPS analysis suggested that catalytic activity of iodine compounds was influenced by the surface acidity. These results suggest that the XEL and AC-I/S are applicable in ozone catalytic oxidation in gas treatments.