PROBLEM TO BE SOLVED: To provide an absorbent article capable of quickly diffusing body fluid and using an absorber in a wide range in a longitudinal direction.SOLUTION: An absorbent article comprises: a liquid permeable top sheet; a liquid impermeable back sheet; and an absorber arranged between the sheets. The absorber comprises: a crotch corresponding region corresponding to a crotch of a wearer in wearing time; and front region and rear region corresponding to a front side/rear side of the crotch corresponding region, respectively. In a region extending over at least, the rear region from the crotch corresponding region, there is provided a density change part in which, density is gradually increased from a front side to a rear side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】適切な速度で体液を拡散させ、吸収体を前後方向の広い範囲で活用することのできる吸収性物品を提供する。【解決手段】透液性のトップシートと、不透液性のバックシートと、両シートの間に設けられた吸収体とを有する吸収性物品であって、前記吸収体は、装着時に装着者の股間に対応する股間対応領域と、前記股間対応領域の前方及び後方にそれぞれ隣接する前方領域及び後方領域とを有し、少なくとも前記股間対応領域から前記後方領域に亘る領域に設けられた、前方から後方に向かって密度が段階的に又は漸次増加する密度変化部を有する。【選択図】図1