Wastewater containing phenol was treated using Pseudomonas sp. B3 in continuous reactor, reaction characteristics and kinetics according to variation of volumetric loading rate in continuous reactor were studied. The removal efficiencies of phenol were more than 99% at the whole range of experiment, and those of COD were 97% at the volumetric loading rate, 0.96 kg/㎥ · d and 88% at 3.0 kg/㎥ · d, respectively. Kinetics constants of q_rn, K_s, Y and K_d were obtained 0.901 1/d, 0.620mg/l, 0.659 and 0.219 1/d, respectively. As compared with to constants of standard activated sludge process, these constants were remarkably different because of toxieity and inhibition of phenol to microbes. And also, kinetics constants of oxygen utilization, a, and b, were shown 0.384 ㎏ O_2/㎏ phenol and 0.029 1/d.