Provided is a toilet system for dogs for which a liquid permeable panel is not easily dislodged. This toilet system (1) for dogs is provided with: a lower container (2) that has an excrement accommodating part (21) for accommodating excrement and is open on the upper side a disposable liquid permeable panel (3) that is disposed so as to cover the upper part of the excrement accommodating part (21) and has water absorbency a panel support part (4) that is disposed between the lower container (2) and the liquid permeable panel (3) and supports the liquid permeable panel (3) and a panel holding part (10) that holds down at least a portion of the liquid permeable panel (3) in the vicinity of the peripheral edge part thereof from the upper surface side of the liquid permeable panel (3).