An absorbent article provided with an absorbent body (4) including a long and narrow absorbent core (40) which is long in the front-rear direction of the absorbent article, and is positioned between a non-skin-side sheet (3) for forming a non-skin-facing surface and skin-side sheets (2a, 2b) for forming a skin-facing surface, wherein: the absorbent core (40) is equipped with lateral regions (45) positioned in an excretion section on both sides in the widthwise direction, and a center region (41) which is thicker than the lateral regions (45) and positioned to the center in the widthwise direction relative to the lateral regions (45)； the lateral regions (45) and the center region (41) are integrally formed with one another； the center region (41) projects in the direction of the non-skin-side sheet； and a region of the absorbent body (4) where the lateral regions (45) are present when seen from a planar view has a non-joined region not joined to the non-skin-side sheet (3).
