PROBLEM TO BE SOLVED: To provide an absorbent article in which adjacent cells coalesce easily, and which includes a cell absorber excellent in cell volume increment to a cell coalesce number.SOLUTION: An absorbent article comprises an absorber 50 whose periphery is surrounded by joint parts 54 of a front side sheet 51 and a back side sheet 52, and which comprises cells 55 to which the front side sheet 51 and the back side sheet are not jointed, and particulate matter containing high absorbent polymer particles 53 included in the cells. In the absorbent article, regular octagons, which have a same dimension whose all interior angles are 135 degree and lengths of two sets of opposite sides whose facing directions are orthogonal to each other, are arranged without a gap in a cross direction LD and a width direction WD, in which the joint parts are arranged in a dotted line state along a pattern in which parts between the octagons are diamonds whose all sides have an equal length, thereby forming octagonal cell 55A and diamond-shaped cells 55B. At least joint parts positioned on continuous two sides in each octagonal cell are weak joint parts 54b which can peel by expansion force of the high absorbent polymer particles in the cell adjacent to the joint part.SELECTED DRAWING: Figure 7【課題】隣接するセル同士が合体しやすく、かつセル合体数に対するセル容積増加量にも優れるセル吸収体を備えた吸収性物品を提供する。【解決手段】表側シート５１及び裏側シート５２の接合部５４により囲まれ、かつ表側シート５１及び裏側シートが接合されていないセル５５と、このセルに含まれた、高吸収性ポリマー粒子５３を含む粉粒体とを有する吸収体５０を備え、すべての内角が１３５度で、互いに対向方向が直交する２組の対辺の長さが等しい同一寸法の八角形が、前後方向ＬＤ及び幅方向ＷＤに隙間なく並び、当該八角形部分の間の部分がすべての辺の長さが等しい菱形をなすパターンに沿って接合部が点線状に設けられ、それにより八角形のセル５５Ａ及び菱形のセル５５Ｂが形成され、八角形の各セルにおける、少なくとも連続する２辺に位置する接合部が、当該接合部に隣接するセル内の高吸収性ポリマー粒子の膨張力により剥離可能な弱接合部５４ｂとする。【選択図】図７
