A plasma generating apparatus for a secondary battery, comprising: a transfer roller configured to transfer a separator (12, 14); a metal member built in the transfer roller; a plasma generating member configured to interact with the metal member to generate plasma and irradiate the generated plasma onto a surface of the separator (12, 14); and protrusion members configured to realize an adhesion area from which a portion of the separator (12, 14) closely attached to the transfer roller protrudes and onto which the plasma is irradiated to provide adhesion and a non-adhesion area onto which the plasma is not irradiated or is weakly irradiated when compared with the adhesion area so that there is no adhesion or the resulting adhesion is weaker than that of the adhesion area, the separator has a bottom surface closely attached to the transfer roller, a top surface protruding by the protrusion members, and a connection surface connecting the bottom surface to the top surface, the plasma is irradiated onto the bottom surface and the top surface to provide the adhesion area having the adhesion, and the non-adhesion area having no adhesion or adhesion weaker than that of the adhesion area is provided on the connection surface while the irradiated plasma is concentrated onto the top surface, the bottom surface and the top surface are provided as surfaces parallel to a longitudinal direction of the transfer roller, and the connection surface is provided as a vertical surface perpendicular to the bottom surface and the top surface, wherein the protrusion members have a ring shape along a circumferential surface of the transfer roller, and said protrusion members are provided in a longitudinal direction of the transfer roller, wherein the protrusion members having the ring shape are configured to move in the longitudinal direction of the transfer roller and be fixed so as to adjust in position the adhesion area. a transfer roller configured to transfer a separator (12, 14); a metal member built in the transfer roller; a plasma generating member configured to interact with the metal member to generate plasma and irradiate the generated plasma onto a surface of the separator (12, 14); and protrusion members configured to realize an adhesion area from which a portion of the separator (12, 14) closely attached to the transfer roller protrudes and onto which the plasma is irradiated to provide adhesion and a non-adhesion area onto which the plasma is not irradiated or is weakly irradiated when compared with the adhesion area so that there is no adhesion or the resulting adhesion is weaker than that of the adhesion area, the separator has a bottom surface closely attached to the transfer roller, a top surface protruding by the protrusion members, and a connection surface connecting the bottom surface to the top surface, the plasma is irradiated onto the bottom surface and the top surface to provide the adhesion area having the adhesion, and the non-adhesion area having no adhesion or adhesion weaker than that of the adhesion area is provided on the connection surface while the irradiated plasma is concentrated onto the top surface, the bottom surface and the top surface are provided as surfaces parallel to a longitudinal direction of the transfer roller, and the connection surface is provided as a vertical surface perpendicular to the bottom surface and the top surface, wherein the protrusion members have a ring shape along a circumferential surface of the transfer roller, and said protrusion members are provided in a longitudinal direction of the transfer roller, wherein the protrusion members having the ring shape are configured to move in the longitudinal direction of the transfer roller and be fixed so as to adjust in position the adhesion area.