PROBLEM TO BE SOLVED: To provide an absorbent article for animals preventing an absorption body from being easily deviated or removed from a belt body in the absorbent article for animals including the belt body and the absorption body fixed to the belt body.SOLUTION: The absorbent article for animals according to the present invention includes a belt body (1) and an absorption body (10). The absorption body (10) has a vertically-long shape having a longitudinal direction and the width direction in plane view thereof in a developed state, and includes an inner surface facing a skin surface of an animal when being worn, and an outer surface being an opposite-side surface of the inner surface. Further, the absorbent article includes, at least at one surface of the inner surface and the outer surface, an absorption-body-side engagement part in which an end part of at least one of a dorsal end part (E) and an abdominal end part (E) located at both ends in the longitudinal direction, is inserted into a trunk facing surface side of the belt body (1) or the inside of the belt body (1) from a rear side in the front-back direction of the animal and engaged with the surface of the trunk facing surface or the inside of the belt body (1).SELECTED DRAWING: Figure 1【課題】本発明は、帯体部と該帯体部に固定される吸収本体部とを備えた動物用吸収性物品であって、前記吸収本体部が前記帯体部からズレたり、外れたりしにくい動物用吸収性物品を提供する。【解決手段】本発明の動物用吸収性物品は、帯体部（１）と、吸収本体部（１０）とを備えており、前記吸収本体部（１０）は、展開した状態の平面視にて、長手方向及び幅方向を有する縦長の形状を有するとともに、装着時に動物の肌面に対向する内表面と、該内表面の反対側の面となる外表面と、を有し、さらに、前記長手方向の両端に位置する背部側端部（ＥL4）及び腹部側端部（ＥL3）のうちの少なくとも一方の端部が、動物の前後方向における後方側から前記帯体部（１）の胴体対向面側又は前記帯体部（１）の内部に挿入されて前記帯体部（１）の胴体対向面又は前記内部の表面と係合する吸収本体部側係合部を、前記内表面及び前記外表面のうちの少なくとも一方の面に備えている。【選択図】図１
