Abstract: A pet diaper includes a main body portion composed of at least a front sheet, a back sheet, and an absorbent core disposed between the front sheet and the back sheet. The main body portion has a ventral side configured to cover a ventral side of a pet and a dorsal side configured to cover a dorsal side of the pet. The main body portion includes a first cut portion configured to form a first opening through which a tail of the pet is inserted and a second cut portion configured to form a second opening through which feces of the pet pass, the second opening having a larger area than the first opening. At least a part of the first cut portion and a part of the second cut portion are disposed on an outer surface of the main body portion in a folded state.

Abstract: A pet diaper for a pet includes an absorbent body including an absorbent core and a pair of fastening tabs extending outward from edges of the absorbent body in a width direction. The absorbent body, having a tail hole through which a tail of the pet passes, includes a center portion in which the absorbent core is disposed and a pair of side portions protruding outward from edges of the absorbent core in the width direction. In the width direction, a maximum width of the absorbent core is larger than a maximum width of either of the pair of side portions. A width in the width direction of at least a portion of a region of the absorbent core between the pair of fastening tabs is narrowed toward the tail hole.

Abstract: A pet diaper extends in a lateral direction along a waist of a pet and in a longitudinal direction from a ventral side to a dorsal side of the pet, the lateral direction being orthogonal to the longitudinal direction, and the pet diaper includes: a main body including: an absorbent core; and a tail hole having a longitudinally elongated shape with a largest opening width in the longitudinal direction that is larger than a largest opening width in the lateral direction; a pair of fastening tabs, disposed closer to the ventral side than is the tail hole, that extend outward from a lateral side edge of the main body; and a target portion, disposed closer to the dorsal side than is the tail hole, that engages with the pair of fastening tabs.