The present invention provides an absorbent article that can prevent leakage from the back side in the longitudinal direction while preventing side leakage of excretory liquid steadily. An absorbent article according to the present invention includes an absorbent main body (2) provided with an absorber (21) and a pair of leak-proof walls, each of the pair of leak-proof walls being a base. (41), a first wall portion (42), a second wall portion (43), a liquid flow control portion (F) including a first joint portion (44) and a second joint portion (45). C )), and the absorbent body (21) has, in plan view, the back region side edge in the longitudinal direction of the inner side edge in the width direction of the second joint (45) in the longitudinal direction. It is located on the outer side in the longitudinal direction from the inner side end (45E i ) located on the innermost side, and both end edges in the width direction of the absorber (21) are at least at the back region (A B ). It is arrange positioned in an absorption main-body part (2) so that it may be located in the outer side of the width direction rather than the inner side edge in the width direction of (41). [Selection] Figure 1【課題】本発明は、排泄液の横漏れを着実に防ぎつつ、長手方向における背部側からの漏れも生じ難くすることができる吸収性物品を提供する。【解決手段】本発明の吸収性物品は、吸収体（２１）を備えた吸収本体部（２）と、一対の防漏壁部とを具備し、一対の防漏壁部の各々は、基部（４１）と、第１壁部（４２）と、第２壁部（４３）と、第１接合部（４４）及び第２接合部（４５）を含んで構成された液流動制御部（ＦC）とを有し、吸収体（２１）は、平面視にて、長手方向における背部領域側端縁が前記第２接合部（４５）の幅方向における内方側端縁のうち長手方向の最も内方側に位置する内方側端部（４５Ｅｉ）よりも長手方向の外方側に位置すると共に、吸収体（２１）の幅方向における両端縁が少なくとも背部領域（ＡＢ）において基部（４１）の幅方向における内方側端縁よりも幅方向の外方側に位置するように、吸収本体部（２）内に配置されている。【選択図】図１
