There is provided an absorbent article (1) having a longitudinal direction, a lateral direction, and a front-back direction. The absorbent article (1) includes: a front waist portion (30) extending along the lateral direction； a back waist portion (20) extending along the lateral direction； and a crotch portion (10) provided between the front waist portion (30) and the back waist portion (20). A one-side end portion of the back waist portion (20) on a one side in the lateral direction is joined by a first joining portion (50) to a one-side end portion of the front waist portion (30) on the one side in the lateral direction. An other-side end portion of the back waist portion (20) on an other side in the lateral direction is joined by a second joining portion (51) to a fastening member (40), and the fastening member (40) has a fastening portion (41) being capable of being fastened to the front waist portion (30) when putting on the absorbent article (1). A joining strength of the second joining portion (51) is larger than a joining strength of the first joining portion (50).
