PROBLEM TO BE SOLVED: To prevent a ventral region in a fastening type disposable diaper for a pet from loosing its shape.SOLUTION: The fastening type disposable diaper for the pet includes: a dorsal region B to cover a back a gluteal covering part M to cover the anus in a lower side than the tail and the vicinity of a much lower area the ventral region F to cover the abdomen on a front side than the gluteal covering part M and fastening parts 13A provided on both sides of the dorsal region F and fastened to the dorsal region B. The fastening type disposable diaper for the pet, which is also provided with an absorbent 56 in the ventral region F and constituted to be put on by fastening the fastening parts 13A on both sides of the dorsal region F to the outside of the dorsal region B, includes shape correction members 70 on the ventral region F.COPYRIGHT: (C)2012,JPO&INPIT【課題】ペット用止着式使い捨ておむつにおける腹側部分の型崩れを防止する。【解決手段】上記課題は、背中を覆うための背側部分Bと、尻尾より下側における肛門及びその下側近傍を覆うための臀部被覆部分Mと、この臀部被覆部分Mより前側の腹部を覆うための腹側部分Fと、腹側部分Fの両側部に設けられた、背側部分Bに対する係止部13Aとを備え、腹側部分Fに吸収体56を備え、腹側部分Fの両側部の係止部13Aを、背側部分Bの外面に係止することで装着を行うように構成した、ペット用止着式使い捨ておむつにおいて、腹側部分Fに形状補正部材70を設けたことにより解決される。【選択図】図2