The provided absorbent article (1) has an absorbent body (30), wing parts (43) and flap parts (60) extending further outwards in the width direction than the absorbent body, a narrow part (45) narrowing inwards in the width direction between the wing parts and the flap parts. Recessed parts (70) are formed in the flap parts and the narrow part, recessed in the thickness direction of the flap parts and extending rearward from the narrow part. When the wing parts are folded over on a side that does not contact the skin of a user, the flap parts are folded over from the recessed parts on to the side of an item of underwear that does not contact the skin of a user, and thus the side of the flap parts that contacts the skin of a user is arranged so as to face the user.
