PROBLEM TO BE SOLVED: To provide a cage for breeding small animals in a recessed portion for accommodating a toilet container. SOLUTION: A lower cage main body 1 having an opening 10 and standing wall portions 16 and 17 arranged at least a part around the opening 10 and an upper cage main body 2 covering the lower cage main body 1 from above. The inner jaws (horizontal plane 13, first inclined surface 14) formed inside the standing walls 16 and 17, the net-like floor plate 3 mounted on the upper surface of the inner jaws, and the outside of the standing walls 16 and 17. The upper cage body 2 includes an outer edge portion 18 formed on the outer edge portion 18 and a waste storage tray 4 which can be pulled out from the lower cage body 1 and is arranged below the opening 10. It is characterized by being placed. [Selection diagram] Fig. 1【課題】トイレ容器収容凹部小動物飼育用ケージを提供する。【解決手段】開口部１０と、この開口部１０の周囲の少なくとも一部に配置される立壁部１６，１７とを有する下部ケージ本体１と、下部ケージ本体１に上方から被せられる上部ケージ本体２と、立壁部１６，１７の内側に形成される内顎部（水平面１３、第１傾斜面１４）と、内顎部の上面に搭載される網状の床板３と、立壁部１６，１７の外側に形成される外縁部１８と、下部ケージ本体１から引き出し可能であり、開口部１０の下方に配置される不要物収容トレイ４と、を備え、上部ケージ本体２は、外縁部１８の上に載置されることを特徴とする。【選択図】図１
