Abstract: The litter box of the present invention includes first and second mirror-image litter containers mountable on either side of a litter screen. Each container has an opening into a corresponding litter receiving cavity. The litter screen is removably mountable by a snap-on fit onto each of the first and second containers. The screen is sandwiched between the first and second containers when the first and second containers are mounted onto the screen in opposed facing array so that the openings of the containers are disposed against the screen. The screen completely covers the openings when so mounted. Each container has an aperture in a wall thereof. Each aperture is releasably closable by a corresponding manually operable door. Each cavity is shaped to funnel waste screened by the screen from the litter into the aperture upon manual inclination of cavity towards the aperture by a user.