Disclosed is a pant absorbent article having a belt part and a crotch part, the belt part and the crotch part being detachable with each other by a primary fastening system for providing the absorbent article. The belt part includes a front belt and a back belt, the belt part having elasticity in the transverse direction and having a pair of side seams having a seam length LS. The front belt and the back belt each have a primary belt fastening means on a garment facing side, the primary belt fastening means forming part of the fastening system engageable with a primary crotch fastening means.