An adhesive layer coating unit configured to continuously apply an adhesive layer having a first width (a) in a longitudinal direction of a first separator , the adhesive layer coating unit comprising: a transfer roller configured to support a bottom surface of the first separator and transfer the first separator ; a discharge roller configured to transfer the first separator , which has passed through the transfer roller , in conjunction with the transfer roller while supporting a top surface of the first separator , wherein a coating groove having the first width and a closed curve shape is formed in a circumferential surface of the discharge roller ; a coating member configured to inject an adhesive into a space between the discharge roller and the top surface of the first separator which has passed through the transfer roller , wherein as the adhesive flows in the coating groove of the discharge roller , the adhesive layer having the first width is continuously applied on the top surface of the first separator ; a case , wherein the transfer roller and the discharge roller are installed inside the case , and both ends between the transfer roller and the discharge roller are finished thereby; and a curing member which emits a light source toward the first separator and cures the adhesive layer , which is continuously applied on the first separator , to a set viscosity, wherein a depth of the coating groove is 5 to 15 μm, and the adhesive layer having a thickness of 5 to 15 μm is applied on the top surface of the first separator , wherein a center point of the discharge roller (a2) is positioned on a different vertical line from a center point of the transfer roller (a1), and is positioned above the center point of the transfer roller (a1), wherein the first width (a) is less than a width (b) of the first separator . a transfer roller configured to support a bottom surface of the first separator and transfer the first separator ; a discharge roller configured to transfer the first separator , which has passed through the transfer roller , in conjunction with the transfer roller while supporting a top surface of the first separator , wherein a coating groove having the first width and a closed curve shape is formed in a circumferential surface of the discharge roller ; a coating member configured to inject an adhesive into a space between the discharge roller and the top surface of the first separator which has passed through the transfer roller , wherein as the adhesive flows in the coating groove of the discharge roller , the adhesive layer having the first width is continuously applied on the top surface of the first separator ; a case , wherein the transfer roller and the discharge roller are installed inside the case , and both ends between the transfer roller and the discharge roller are finished thereby; and a curing member which emits a light source toward the first separator and cures the adhesive layer , which is continuously applied on the first separator , to a set viscosity, wherein a depth of the coating groove is 5 to 15 μm, and the adhesive layer having a thickness of 5 to 15 μm is applied on the top surface of the first separator , wherein a center point of the discharge roller (a2) is positioned on a different vertical line from a center point of the transfer roller (a1), and is positioned above the center point of the transfer roller (a1), wherein the first width (a) is less than a width (b) of the first separator . <EOS>