Provided is an absorbent article that makes it easier to deform the portion of the absorbent core corresponding to the wearer's buttocks into a cup shape and can suppress leakage of body fluid. An absorbent article (10) includes a front-rear direction (L), a width direction (W) orthogonal to the front-rear direction, a front waistline region (S1), a rear waistline region (S2), a crotch region (S3) arranged between the front waistline region and the rear waistline region, an absorbent core (51) extending at least from the crotch region to the rear waistline region, and an elastic member (32) at least partially overlapping the absorbent core in the rear waistline region and expanding and contracting in the width direction. A folding line (FL) for folding the absorbent article in half extends along the width direction in the crotch region. The absorbent core has a pair of side slits (58) located at both outside edges of the absorbent core in the width direction. An inner edge part located on an innermost side of the pair of side slits in the width direction is located on a rear side relative to an intermediate line (P1) between a rear end edge of the absorbent core and the folding line.
