In this study, we investigated the effects of gel-layer by wormlike micelle on the removal efficiency of tert-butyl phenol(TBP) from aqueous stream using cationic surfactant cetylpyridinium chloride(CPC) with an additive sodium salicylate (NaSal). When the surfactant was added to the solution at the concentration far above its critical micelle concentration, the surfactant molecules formed micelles, into which organic compounds were dissolved. And then, the micellar solution was forced to pass through an ultrafiltration membrane of which the average pore size was smaller than that of the micelle. To prevent the surfactant and organic compounds from leaking through the membrane, the molecular cut-off(MWCO) 20,000 was selected. The membrane with MWCO of 20,000 gave a very satisfactory removal flux. The added NaSal reduced the concentration of CPC in the permeate and provided the additional resistance on the surface of membrane. Indeed, in the presence of NaSal, CPC micelles containing TBP were rejected more effectively. When the molar ratio of NaSal to CPC was 0.1, the flux showed no appreciable change, compared to that with no NaSal. The rejection efficiency of CPC was maintained above 99%.