There is provided an absorbent article including: a front waist portion, a back waist portion, and a crotch portion. The front waist portion (30) and the back waist portion (20) each include elastic regions X and Y extending along the lateral direction. 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 (1b) 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 (200) of the back waist portion (20) on an other side in the lateral direction is joined by a second joining portion (2b) 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. While the front waist portion (30) and the back waist portion (20) being stretched in the lateral direction, the lateral distance (L6) of the front waist portion (30) from the lateral center (AC) of the absorbent main body (10) to a lateral end (30er) of the front waist portion (30) on the other side is smaller than the lateral distance (L8) of the back waist portion (20) from the lateral center (AC) of absorbent main body (10) to a lateral end (20er) of the back waist portion (20) on the other side.