To provide a toilet for pet, capable of putting on a toilet seat or a toilet bowl constituting a flushing toilet so as to be usable for all kinds of animals, requiring no labor for settling after each time excretion, convenient to easily change from a toilet for human to that for the pet in a narrow room, satisfying animal instinct, capable of sampling excrements for health monitoring in an emergency, being hygienic and economical.

The toilet body is set on the toilet seat or the toilet bowl constituting the flushing toilet, wherein its side wall is connected to a slope slightly descending to an outlet opening to a waste water chamber, a rim extended from the side wall is connected on the toilet seat or the toilet bowl to be able to hang down and face up and accessories such as an excrements sampler, a nail sharpener and a valve for introducing washing water are freely demountably formed on the slope plate, the rim, the side wall and the like.