PROBLEM TO BE SOLVED: To provide an absorbent article for pets that can suitably cover the rear side of a pets urinary organs with three-dimensional gather portions without placing a burden on the pets body.SOLUTION: The absorbent article 1 for pets includes a liquid-permeable front surface layer 2, a liquid-impermeable back surface layer 3, and an absorber 4 disposed between the front surface layer 2 and the back surface layer 3, and is in the form of a rectangle having a pair of opposite end portions 12, 13 and a pair of opposite side portions 17, 18 perpendicular to the pair of end portions 12, 13. The absorbent article 1 is worn around the girth of a pet. The absorbent article further includes a first three-dimensional gather portion 14 and a second three-dimensional gather portion 15 disposed respectively on the front surface layer 2 side of the pair of side portions 17, 18 and rising from the front surface layer 2. The first three-dimensional gather portion 14 is formed to be easily collapsible toward the outside of the absorbent article 1 along its width direction WD.COPYRIGHT: (C)2013,JPO&INPIT【課題】ペットの身体に負担をかけることなく、立体ギャザー部によりペットの泌尿器の後側を好適に覆うことのできるペット用吸収性物品を提供すること。【解決手段】液透過性の表面層2、液不透過性の裏面層3及び表面層2及び裏面層3の間に配置される吸収体4を備えると共に、互いに対向する一対の端部12,13と、一対の端部12,13に直交し互いに対向する一対の側部17,18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、一対の側部17,18における表面層2側にそれぞれ配置され、表面層2から起立する第1立体ギャザー部14及び第2立体ギャザー部15を更に備え、第1立体ギャザー部14は、ペット用吸収性物品1の幅方向WDの外側に倒れやすく構成される。【選択図】図5