The absorption of SO2 from the gas mixtures of SO2/N-2 into deionized water was measured under corona discharge at 22 degreesC and 1 atm. A model based on film theory was developed to evaluate the effects of mass-transfer enhancement in the liquid phase by chemical dissociations and corona discharge current. It has previously been reported that mass transfer in the gas phase is enhanced by corona discharge. In this study, it was also found that corona discharge enhances mass transfer in the liquid phase through liquid-side boundary-laver thinning caused by corona-induced surface vibrations. The liquid boundary layer decreases as the corona power is increased. For our experimental conditions, mass transfer was enhanced by about 5.5 times in the gas phase and about 2.3 times in the liquid phase.