The glycerol behavior in dealcoholization process is similar to maltose. Some glycerol compounds are found in the permeate stream but all of them are less than 0.005%-vol. The most optimum conditions obtained from the experiment are 3000 mbar feed pressure and 580 mbar vacuum pressure, resulting 0.69 L/m2 h membrane flux, 3.70%-vol. and 4.60%-vol. ethanol concentration in beer and permeate side respectively, no maltose and only 0.001%-vol. glycerol in permeate side. A long run operation for beer dealcoholization using these operating conditions can reduce the alcohol content from 5%-vol. to 2.45%-vol. in 6 h. Analysis of concentration of some other components in the beer is essential to ensure there are not any significant changes in the beer composition. Sensory characteristics for the dealcoholized beer also have to be tested.