When the [problem] pet to wear, excrement can be prevented from leaking from the waist, to provide a pet diapers can be kept clean. A comprises a body portion 1 with at least double-layer structure to hold and secure the flaky of the water body and the water-absorbent structure, enclose the waist on the body part is at both ends of the length direction part 190a and Shitakoshi equipped with a surround part 190b, in the width direction of the both ends of the enclosing below the waist part, adhesive portion 190c to cover the pet of the waist and belly in the tubular is provided by sticking the Uekoshi surrounding portion when the pet to wear, body parts the tail through section 70 through the tail of the pet to the buttocks of the place is provided when the pet to wear, on the inner side of the length direction of the enclosing below the waist part, three-dimensional folds that can be projections on the skin side of the pet when you wear 500a is provided.FIELD 5【課題】ペットが着用すると、排泄物が腰から漏れることを防止し、清潔に保つことができるペット用おむつを提供する。【解決手段】薄片状の吸水体及び吸水体を保持・固定する少なくとも二重層構造のある本体部1を備え、本体部が長さ方向の両端にある上腰囲み部190a及び下腰囲み部190bを備え、下腰囲み部の幅方向の両端に、ペットが着用する時に上腰囲み部を粘着することにより筒状でペットの腰及び腹をカバーする粘着部190cが設けられ、本体部には、ペットが着用する時に臀部の箇所にペットの尾を通す尾通し部70が設けられ、下腰囲み部の長さ方向の内側に、着用する時にペットの肌側に突起できる立体的折り畳み部500aが設けられる。【選択図】図5