To provide an absorbent article which does not need to be reworked in a worn state and fits the crotch portion of a wearer by a simple attaching operation and can exhibit a high leakage prevention effect.SOLUTION: A pair of belly side flaps 10 are fixed to both side edge portions 5 S of the absorbent main body 5 in the belly side portion 1 F. The absorbent core 40 has a wide portion 40 W having a relatively long length in the lateral direction Y, a narrow portion 40 N having a relatively short length, and an intermediate width portion 40 M positioned therebetween in the longitudinal direction X And both side edge portions 40 MS of the intermediate width portion 40 M are skewed in plan view. The ventral flap fixing point 11 is located on or near the virtual straight line VL and inward of the virtual straight line VL in the longitudinal direction X. The side edge portion 40 MS of the intermediate width portion 40 M is located in the vicinity of the imaginary straight line VL and is oblique along the imaginary straight line VL. The ventral side longitudinal end 53 <；/b>； F of the leg gather forming elastic member 53 is located in the vicinity of the imaginary straight line VL.(FIG.【課題】着用状態の手直しが不要で、簡単な装着操作で着用者の股間部にフィットし、高い漏れ防止効果を奏し得る吸収性物品を提供すること。【解決手段】腹側部１Ｆにおける吸収性本体５の両側縁部５Ｓに、一対の腹側フラップ１０が固定されている。吸収性コア４０は、横方向Ｙの長さが相対的に長い幅広部４０Ｗと、同長さが相対的に短い幅狭部４０Ｎと、両者間に位置する中間幅部４０Ｍとを縦方向Ｘに有し、中間幅部４０Ｍの両側縁部４０ＭＳが平面視において斜行している。腹側フラップ固定点１１αは、仮想直線ＶＬ上又はその近傍で且つ仮想直線ＶＬよりも縦方向Ｘの内方に位置している。中間幅部４０Ｍの側縁部４０ＭＳは、仮想直線ＶＬの近傍に位置し、且つ仮想直線ＶＬに沿って斜行している。レッグギャザー形成用弾性部材５３の腹側縦方向端５３Ｆは、仮想直線ＶＬの近傍に位置している。【選択図】図６
