To provide a playing shelf for cats which is suitable for cats who like assembling shelves using indoor walls, enhancing design effect, exercise to high places or taking a break at high place.SOLUTION: Horizontal groove-like engaging means is provided in a plurality of stages in a longitully elongated wall joining member 1 having a required width, and a shelf plate-like engaging member having a flat plate-like projection on the engaging means 6 movably engaged therewith. In addition to the groove 9 as the engaging means, a mortise hole 11 is also provided. Further, in addition to the shelf plate-like engaging member 6, a box having various input / output holes is also provided.BACKGROUND OF THE INVENTION【課題】室内の壁を利用して棚を組み立てて意匠効果を高め、高所への運動や高所での休憩を好む猫達にぴったりの猫用遊戯棚を提供する。【解決手段】所要幅の縦長の壁面接合部材1に、水平方向の溝状の係合手段を複数段に渡って設け、前記係合手段に平板状の突起を有する棚板状の係合具6を移動自在に係合して成る。前記係合手段としての溝9のほか、ほぞ穴11も提供される。さらに、棚板状の係合具6のほか、各種の出入孔を有するボックスも提供される。【選択図】図1