PROBLEM TO BE SOLVED: To provide an absorbent article configured to effectively use absorption capacity of a back-side absorber.SOLUTION: An absorber 103 includes a longer direction Y and a width direction X orthogonal to the longer direction, and the length in the longer direction is divided into two, a front-side part 31 and a back-side part 32. In plan view from a skin contact face side, the absorber 103 includes a main groove 1 and minor grooves 2 connected to the main groove 1, disposed thereon. The main groove 1 includes an upstream main groove 11 passing a center of the longer direction Y and the width direction X of the absorber 103 and extending to the back-side part 32, and downstream main grooves 12 forked into two from an end portion 11B in the back-side part 32 of the upstream main groove 11 at equal width and extending to the back-side part 32. The main groove 1 has a line-symmetric shape, with a center line L1 along the longer direction of halving the width-directional length of the absorber 103 used as an axis. The minor grooves 2 are branched at the back-side part 32, with the downward main grooves 12 used as headstreams, where the width of the minor grooves 2 is formed narrower than the grooves before the branching and at least terminal minor grooves 2 have surface-area increased portions on wall surfaces.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】後側の吸収体の吸収能力を活用できる吸収性物品を提供する。【解決手段】吸収体１０３は、長手方向Ｙと該長手方向Ｙに直交する幅方向Ｘとを有し、長手方向Ｙの長さを２等分して前側部３１と後側部３２とに区分され、吸収体１０３には、肌当接面側から平面視して、主溝１と、主溝１と連結する副溝２とが配されており、主溝１は、吸収体１０３の長手方向Ｙ及び幅方向Ｘの中心を通り、かつ、後側部３２に延出する上流主溝１１と、上流主溝１１の後側部３２における端部１１Ｂから等幅にて２股に分岐して後側部３２に延出する下流主溝１２とを備え、主溝１は、吸収体１０３の幅方向の長さを２等分する長手方向に沿う中心線Ｌ１を軸に線対称の形状を有しており、副溝２は、後側部３２にて、下流主溝１２を源流として枝分かれしており、副溝２の幅が枝分かれ前の溝よりも狭くされており、少なくとも末端の副溝２は壁面に表面積増大部を有する。【選択図】図２
