A positive electrode which has a positive active material layer formed on a conductive substrate and a polymer film coated on the positive active material layer, wherein the positive active material layer includes a positive active material, pores of which are filled with a polymeric material containing a nonaqueous electrolyte, and the polymer film, and the polymer film formed of the polymeric material containing the nonaqueous electrolyte. The polymeric material is formed by polymerization of a composition comprising a monomer and the nonaqueous electrolyte. The monomer includes 1 to 6 functional groups per molecule, and the functional groups are selected from the group consisting of vinyl, allyl, acryl, methacryl and epoxy group. Since the lithium-sulfur battery using the positive electrode increases degree of the positive active material utilization, the cycle life characteristics and capacity of the battery can be improved, and swelling of the positive electrode of the lithium-sulfur battery can be reduced.