Abstract: A disposable cat litter box including a horizontally extending bottom preferably rectangular and attached along the ends to upwardly extending end walls and side walls which each may be further folded to provide a top cover of one-half the area of the horizontally extending bottom. Furthermore the upwardly extending side walls and end walls may be further folded and through the use of tabs and slots form angled sides.The disposable cat litter box contains litter and is sealed. Upon opening, the cat litter box may easily be formed into an open-top moisture resistant box. After use, the biodegradable cat litter box may be resealed and disposed.