PROBLEM TO BE SOLVED: To make it hard to visually recognize the excrement absorbed in a sheet from a distant place, and to check the excrement by approaching the sheet.SOLUTION: The absorbent sheet 1 for a pet includes an absorber 4 interposed between a hydrophobic liquid-permeable top sheet 3 with a number of apertures 6, 6, ... and a liquid-impermeable back sheet 2. Each aperture 6 has a projecting edge 7 formed along the peripheral edge to project toward the absorber 4. Between an apex point P1 at the front end of the projecting edge 7 and a contact point P2 of a straight line L from the apex P1 toward the base end of the projecting edge on the opposite side in a traverse cross-section taken between the apex P1 and the center point of the aperture, the ratio of a vertical distance B to a planar distance A (B/A) is in the range from 0.25
