The present invention provides an absorbent article that is capable of, while firmly preventing lateral leakage of an excreted liquid, also rendering leakage thereof from the back side in the longitudinal direction to be unlikely to occur. This absorbent article is provided with: an absorbent body (2) that is provided with an absorber (21)； and a pair of leak-proof wall parts, wherein each of the leak-proof wall parts has a base (41), a first wall (42), a second wall (43), and a liquid flow control part (Fc) that is configured by including a first joint (44) and a second joint (45), and the absorber (21) is positioned within the absorbent body (2) such that, in a plan view, the edge on the back region side in the longitudinal direction is positioned longitudinally outside an inside edge (45Ei) positioned furthest inside in the longitudinal direction among inside edges in the width direction of the second joint (45), and such that both edges in the width direction of the absorber (21) are positioned outside of, in the width direction, the inside edges in the width direction of the base (41) in at least a back region (AB).本發明，是提供一種吸收性物品，可以將排泄液的側漏確實地防止，且從長度方向中的背部側漏出也困難。 本發明的吸收性物品，是設有：具備吸收體(21)的吸收本體部(2)、及一對的防漏壁部，一對的防漏壁部分別具有基部(41)、及第1壁部(42)、及第2壁部(43)、及包含：第1接合部(44)及第2接合部(45)地構成的液流動控制部(FC)，吸收體(21)，是從俯視看，長度方向中的背部領域側端緣是位於比前述第2接合部(45)的寬度方向中的內方側端緣之中位於長度方向的最內方側的內方側端部(45Ei)更長度方向的外方側，並且使吸收體(21)的寬度方向中的兩端緣至少在背部領域(AB)位於比基部(41)的寬度方向中的內方側端緣更寬度方向的外方側地，被配置於吸收本體部(2)內。
