Adsorbent CuO/γ-Al 2 O 3 was successfully prepared by the dry impregnation using Cu(NO 3 ) 2 .3H 2 O solution on commercial γ-Al 2 O 3 . Impregnation and calcination process was be done repeatedly to get a desired CuO content on the support. The impregnations were done at 50 o C for 8 hours or 120°C for 5 hours. Calcinations were carried out at a temperature of 400 o C for 8 hours. Adsorbent obtained from this preparation contained Cu: 7.93% (named 8Cu), 14.76% (15Cu) and 28.98% (30Cu). Pore characteristic indicated that the surface area decreased with the increase in Cu content in the adsorbent (from 207 in original support to 124 m 2 /g in 8Cu). Similar tendency was found for the pore volume (from 0.47 to 0.28 mL/g).In batch adsorption test, the amount of adsorbed SO 2 was calculated from the increase in mass of adsorbent. Adsorbent 8Cu had the best adsorption capacity in term of mol ratio, ie. 0.78 SO 2 /CuO (close to stoichiometry). Original support of γ-Al 2 O 3 was found to be inert to SO 2 . In semi-continue test, the adsorption was carried under a flow of gas containing 2.5% SO 2 . The amount of adsorbed SO 2 was calculated from the different of SO 2 content between influent to effluent. It was found again that the best adsorbent was 8Cu with the adsorption capacity of 0.97 mol/mol CuO.