An absorbent article for a pet animal that can prevent side leakage of urination is provided. In an absorbent article for a pet animal, comprising an inner layer sheet 22 having liquid permeability, an outer layer sheet 23 having liquid impermeability, and an absorbent core 51 interposed therebetween. The sex core is disposed only in the ventral region 11 with respect to the cutting line 55 through which the tail of the pet animal located in the intermediate region 13 is inserted, and the body facing surface of the inner layer sheet is at least in plan view In the region where the absorbent core is overlapped, there is an uneven portion 60 formed by the flange portions 61 and the groove portions 62 that extend in the vertical direction Y and are alternately arranged in the horizontal direction X. [Selection] Figure 2【課題】排尿の横漏れを防止できる愛玩動物用の吸収性物品の提供。【解決手段】 透液性を有する内層シート２２と、不透液性を有する外層シート２３と、それらの間に介在された吸収性コア５１とを含む愛玩動物用の吸収性物品において、前記吸収性コアは、中間域１３に位置する前記愛玩動物の尻尾が挿通される切断ライン５５よりも腹側域１１にのみ配置されており、前記内層シートの身体対向面には、少なくとも平面視において前記吸収性コアを重なる領域において、縦方向Ｙへ延びて横方向Ｘに交互に並ぶ畝部６１と溝部６２とから形成された凹凸部６０が位置する。【選択図】図２
