A disposable folding type sanitary toilet for pets includes a folding type receiving unit configured in the form of a box having a receiving space. A wall of the box is configured to fold such that the volume of the receiving unit is adjusted, thereby allowing the sanitary toilet to be easily stored and carried. The sanitary toilet further includes a case unit for containing the bottom of the receiving unit and protecting the bottom, top, and sides of the receiving unit. The receiving unit includes a top plate, a wall unit connected to the top plate, the wall unit having horizontal folds formed at its exterior for adjusting the vertical height of the wall unit, and a lower receiving part coupled to the bottom of the wall unit and having a receiving space. An attached filter may be deployed during closure to inhibit discharge of dust and/or microbial contaminants.