To provide a structure for a pet animal in which top/bottom ends, both front/rear ends and both left/right ends of multiple unit bodies can simultaneously be connected to obtain strong coupling strength, and thereby rigidity can be improved.SOLUTION: A structure for a pet animal includes multiple first, second and main unit bodies 11-13 where circumferential walls are formed by coupling ends of 4-rectangular frame bodies 21 becoming the same rectangle frame shape. Respective unit bodies 11-13 are configured by alternately coupling one circumferential direction edge with the inside surface of the other circumferential direction edge of the respective rectangular frame bodies 21 being adjacent each other in the circumferential direction so that the respective rectangle frame bodies 21 may become the frame bodies each with a square shape in a plan view. Slits 34 for inserting dowels are recessed in the vicinity of the four corners of both of upper and lower end faces in upper and lower border sections 14 of the respective unit bodies 11-13. Through-holes for inserting bolt members and box nuts are provided in the vicinity of the four corners of the respective rectangle frame bodies 21. The respective unit bodies 11-13 are coupled from right to left or up and down by using the dowels as well as the bolt members and box nuts.SELECTED DRAWING: Figure 1【課題】複数のユニット本体の上下端同士と前後両端同士及び左右両端同士とを同時に連結可能にして強固な連結強度を得ることで、剛性を向上させることができる愛玩動物用構造体を提供する。【解決手段】同一の矩形枠状となる４つの矩形枠体２１の端部同士を連結して周壁が形成される第１、第２及び主ユニット本体１１～１３を複数備える。各ユニット本体１１～１３を、各矩形枠体２１を平面視で正方形状を呈する枠体となるように周方向で互いに相隣なる各矩形枠体２１のうちの一方の周方向端と他方の周方向端の内側面とを周方向で交互に連結して構成する。各ユニット本体１１～１３の上下の枠部分１４における上下両端面の四隅付近にダボを挿通するダボ穴３４を凹設し、各矩形枠体２１の四隅付近にボルト部材及び袋ナットを挿通する貫通孔を設ける。各ユニット本体１１～１３を、ダボ並びにボルト部材及び袋ナットにより上下左右に連結する。【選択図】図１
