PROBLEM TO BE SOLVED: To provide an absorbable sheet for pets, which is easily inserted into a tray of a pet toilet and hardly forms a space between the sheet and the tray after inserted.SOLUTION: An absorbable sheet 1 for pets, comprising a liquid-transmitting front side sheet 11, a liquid-non-transmitting back side sheet 12, and an absorbent 13 interposed between the front side sheet 11 and the back side sheet 12, is characterized by exhibiting an approximately rectangular shape having short sides and long sides on the planar view, and having rigid reinforced portions extended along the long sides.COPYRIGHT: (C)2014,JPO&INPIT【課題】ペット用トイレのトレーに挿入し易く、且つ挿入後にトレーとの間に隙間の発生しづらいペット用吸収性シートを提供する。【解決手段】透液性の表面シート11と、不透液性の裏面シート12と、表面シート11と裏面シート12との間に介装される吸収体13とからなるペット用吸収性シート1において、短辺及び長辺を有する平面視略長方形状を呈し、長辺に沿って延在する剛性強化部を備える。【選択図】図1