A manufacturing method of an absorbent article according to the present invention includes the steps of a leg circumference forming process of forming a leg circumferential region on a web which is continuously fed in an MD, in a conveyance device, and a folding process of folding the web in two after the leg circumference forming process, so that a second half region on one divided by a center line in a CD comes closer to or overlaps a first half region on the other side. In the folding process, the first half region is conveyed on a conveyance belt which drives horizontally in parallel to an installation surface of the conveyance device (for example, a folding device) and the second half region is folded towards the first half region by a guide unit that guides the second half region.
