The object is to prevent detachment of joint sections during movement by a wearer when an absorbent article is being worn, and to facilitate separation of an abdomen side section and dorsal side section without tearing of sheet members, when it is removed. The joint sections 14a, 14b of the absorbent article include a plurality of fused sections 21Db, 21Ub along the longitudinal direction. Each fused section includes a core section BA where the sheet members on the abdomen side section 11 and dorsal side section 13 are fused in a thickness direction, and a perimeter wall section BW where the sheet member on the abdomen side section and dorsal side section are fused in the thickness direction, surrounding the core section in a tubular manner. For both longitudinal direction and transverse direction, if a first direction is a direction in which a difference in widths of the perimeter wall sections located on both outer sides of the core section is small and a second direction is a direction in which it is large, then for the second direction, a first dimension PI, which is a width of the perimeter wall section located on a second direction first side D2I of the core section is equal to or more than 40% and less than 100% of a second dimension P2, which is a width of the perimeter wall section located on a second direction second side D2II of the core section.
