To provide a pet for a pet and a structure for a pet which can be assembled freely and can be firmly connected.A companion animal housing (100) comprises a substantially rectangular parallelepiped or substantially cubic casing body (10) having accommodation spaces inside by a plurality of side surface portions (11, 12), a casing main body (10) detachably connected A plurality of box-like connecting bodies 20 and 20, a lid body 30, and a pet nail member 40 for pet animals. A bent peripheral wall portion 24 is provided on the peripheral edge of the box-like connecting body 20 to which the housing body 10 is detachably engaged, and the bent peripheral wall portion 24 is provided with engaging coupling portions 22 a, 28 a Or 26a.BACKGROUND OF THE INVENTION【課題】組み立てが自在で、かつ、強固に連結することができる愛玩動物用筐体及び愛玩動物用構造体を提供する。【解決手段】愛玩動物用筐体100は、複数の側面部11,12で内側に収容空間を有する略直方体状又は略立方体状の筐体本体10と、筐体本体10が着脱自在に連結される複数の箱状連結体20,20と、蓋体30と、愛玩動物用爪研部材40とを備えている。筐体本体10が着脱自在に係合される箱状連結体20の周縁に折曲周壁部24を設け、折曲周壁部24に他の筐体本体が連結される係合連結部22a,28a又は26aを設けた。【選択図】図1