This animal toilet (1) has a longitudinal direction, a horizontal direction and a height direction, and comprises a cover (4) having an opening (41) for an animal to enter and exit, an upper container (2) having multiple holes (210) through which urine passes, and a lower container (5). The edge (24) of the upper container (2) is positioned over the edge (53) of the lower container (5), and the edge (45) of the cover (4) is positioned outward of the edge (24) of the upper container (2). Below the edge (24) of the upper container (2), a hole (46) is provided in the edge (45) of the cover (4) below the edge (24) of the upper container (2), a protruding portion (532) is provided in the lower container (5) for insertion into the hole (46) and, in the horizontal direction, the protruding portion (532) protrudes outward of the upper container (2).動物用便器(1),係具備前後方向、左右方向、及高度方向,並且具有:具備用以供動物出入的開口部(41)之外罩(4)、設有供尿液通過的複數個孔(210)之上容器(2)、及下容器(5),上容器(2)的緣部(24)係位在下容器(5)的緣部(53)上,外罩(4)的緣部(45)係位在比上容器(2)的緣部(24)更靠外側,在比上容器(2)的緣部(24)更靠下方處於外罩(4)的緣部(45)設置有孔(46),在比上容器(2)的緣部(24)更靠下方處於下容器(5)設置有插入至孔(46)的凸部(532),凸部(532)在左右方向係朝比上容器(2)更靠外側突出。1‧‧‧動物用便器2‧‧‧上容器3‧‧‧托盤4‧‧‧外罩4b‧‧‧折入部5‧‧‧下容器21‧‧‧尿液通過部22‧‧‧底面23‧‧‧側壁部32‧‧‧把手41‧‧‧開口部42‧‧‧側壁部43‧‧‧前方壁部44‧‧‧後方壁部45‧‧‧緣部46‧‧‧孔54b‧‧‧凹部210‧‧‧孔451‧‧‧外罩側嵌合部532‧‧‧凸部
