PROBLEM TO BE SOLVED: To provide an absorbent article for a pet which is repetitively attached and detached without damaging a surface sheet, even when an engaging member is disposed on the surface sheet side.SOLUTION: The absorbent article 1 for a pet includes the surface sheet 2, a back surface layer 3, and an absorber 4, has a first end part 11, second end part 12, and a pair of side parts 17, is formed into a rectangular shape, and is wound around the body of a pet and mounted thereon. The absorbent article further includes: an engaging member 7 disposed on the surface sheet 2 side near the first end part 11 an engaged portion 8 provided on the back surface layer 3 near the second end part 12 and engaged with the engaging member 7 and a reinforcing member 9 disposed between the engaging member 7 and the surface sheet 2, and having a peel force at a part connected with the engaging member 7, the peel force larger than that of the surface sheet 2 connected to the engaging member 7.COPYRIGHT: (C)2013,JPO&INPIT【課題】表面シート側に係合部材を配置した場合であっても、表面シートを破損することなく繰り返し着脱可能なペット用吸収性物品を提供すること。【解決手段】表面シート2、裏面層3、及び吸収体4を備えると共に、第1端部11及び第2端部12と、一対の側部17と、を有して矩形形状に構成され、ペットの胴回りに巻きつけられて装着されるペット用吸収性物品1であって、第1端部11の近傍の表面シート2側に配置される係合部材7と、第2端部12の近傍の裏面層3側に設けられ係合部材7に係合可能な被係合部8と、係合部材7と表面シート2との間に配置され、係合部材7に接合された部位の剥離力が、表面シート2が係合部材7に接合された場合における表面シート2の剥離力よりも大きい補強部材9と、を更に備える。【選択図】図2