A first web 65 comprises a series of sheet members contiguous to one another in a transverse direction of this web, each of the sheet members defining an outer surface of a disposable wearing article 1, is continuously fed in a first machine direction MD1. A second web 367 presenting a Ω-shaped cross-section and configured to form individual adhesive taper strips is fed in a second machine direction MD2 orthogonal to the first machine direction MD1. The second web 367 is periodically cut in a second cross direction CD2 orthogonal to the second machine direction MD2 to obtain composites 67 configured to be a pair of the adhesive tape strips. After the composite 67 has been fed in the second machine direction MD2 and attached to the first web 65, the first web 65 is cut together with the composite 67 so as to bisect the length of the composite 67. Respective halves of the composite 67 bisected in this manner become the individual adhesive tape strips.
