The folding apparatus 100 by which a continuous web to form an absorbent article 1 is folded into two along a folding line extending in a conveyance direction MD of the web 7 by bringing one side edge 10A of the web 7 toward an opposite side edge 20A thereof. The folding apparatus 100 includes a large-diameter roller 110 configured to press a reference region 11 extending from the folding line to the opposite side edge 20A, a folding guide bar 130 configured to support the web 7 at the folding line and a guide mechanism 140 configured to guide a folded region 12 toward the reference region 11, the folded region 12 extending from the folding line to the one side edge 10A. The folding guide bar 130 includes a slide portion 131 configured to allow the web 7 to slide thereon. The slide portion 131 has a friction coefficient of not more than 0.4.
