An object of the present invention high stability when the cat enters the inside of the cylindrical member , to provide a sharpening cat claw of circle that easy to put the neck on the top surface of the cat is a cylindrical member that has entered inside . And the bottom member A shape as viewed from above is circular , and a cylindrical member forming the wall from the outer periphery of the bottom member toward the upper , inner peripheral surface of the upper surface and said cylindrical member of said bottom member the cat is the method comprising sharpening scratching nail cats member is arranged to sharpen the nail , the height of sharpening the cats claw H (mm), when the outer diameter is set to D (mm) , H / D is 0.385 or less . [ Selection Figure Figure 1【課題】猫が円筒部材の内部に入るときの安定性が高く、内部に入った猫が円筒部材の上面に首を乗せやすいサークル型の猫用爪研ぎを提供する。【解決手段】上方からみた形状が円形である底面部材と、前記底面部材の外周から上方に向かって壁を形成する円筒部材とを有し、前記底面部材の上面及び前記円筒部材の内周表面には、猫が爪を研ぐための爪研ぎ部材が配置されている猫用爪研ぎであって、前記猫用爪研ぎの高さをH(mm)、外径をD(mm)としたとき、H/Dが0.385以下である。【選択図】図1
