An adhesive is applied in such a curved trajectory that an angle formed by a tangent line and an axis falls within a range of ±90° in a plan view of a web obtained by the overlapping a first web and a second web. The tangent line is drawn at any point on the trajectory of the adhesive. The axis is orthogonal to a trailing side of a pressing region, in which the web is pressed by an upper roller, in a conveyance direction.