Provided is an absorbent article for a pet animal being capable of prevent urine leaking out of a tail opening. The absorbent article includes a cutting line forming the fail opening positioned on a dorsal region side in an intermediate region and an indicator positioned on a body non-facing surface of an absorbent layer and to show a color reaction by coming in contact with excreted urine. The absorbent layer is positioned between the cutting line and a ventral region. The absorbent core has a first end edge and a second end edge opposite to the first end edge in a longitudinal direction, and the indicator is positioned longitudinally outboard of at least the first end edge of the first end edge and the second end edge.
