The permeation rate of Co(II) from a dilute aqueous sulfate media using supported liquid membrane technique has been studied. The microporous hydrophobic PVDF film was used as the solid support for the liquid membrane and cyanex 272 was used as mobile carrier. Effect of different parameters such as pH and Co concentration of feed solution, cyanex concentration and pH, and Co concentration of strip solution on cobalt flux Jco(II), was studied. The order of Cobalt flux, Jco(II) was 10^-6mol/m2-sec.