Disclosed is a liquid permeable panel that is of a system toilet for animals and that can prevent urine wetting resulting from torsion or folding over of a pee pad. The liquid permeable panel (3) covers the excrement containment section (6) of the system toilet (1) for animals. Of the aforementioned panel the side surface 1 cm compression deformation load which is the load necessary for at least 1cm of torsion to arise with respect to load from the side surface direction (X) that is perpendicular to the direction of thickness of said panel is at least 5 N and no greater than 20 N. Preferably the liquid permeable panel (3) has a plurality of holes (31) that penetrate said liquid permeable panel (3) in the direction of thickness and has as a material corrugated cardboard wherein liquid goes through the aforementioned plurality of holes (31) passing through in the direction of thickness of the aforementioned liquid permeable panel.
