Provided is an absorbent article wherein both of the following are achieved in a more improved manner: a ventral part and a dorsal part are not easily separated when the absorbent article is worn； and the ventral part and the dorsal part are easily separated longitudinally when the absorbent article is removed. In this absorbent article, the ventral part (11) and dorsal part (13) are joined to each other at a joint part (14a) with widthwise end parts thereof overlapped on at least one side. The joint part is provided with a plurality of fusion-bonding parts (30). The fusion-bonding part has: a fused part (MC) wherein a plurality of sheets of the ventral part and a plurality of sheets of the dorsal part are fused to each other in the thickness direction； and a side wall part (SW) wherein the plurality of sheets of the ventral part and plurality of sheets of the dorsal part are fused to each other in the thickness direction so as to extend in a tubular shape in the thickness direction from the peripheral edge of the fused part. The position of the fused part in the thickness direction is offset from the boundary between the ventral part and dorsal part. The dimension of the side wall part in the thickness direction is greater than the dimension of the fused part in the thickness direction. The longitudinal dimension of the side wall part is smaller than the widthwise dimension thereof.
