Direction of the hole of the artificial bone, try to be able know easily and accurately. Artificial bone 10 artificial aggregate charge (the artificial bone itself) has the hole 2 which, orientation is made substantially unidirectionally inside 1 on the surface shows the orientation direction of the hole 2 which orientation is done in uniaxial direction, for example, attaching the sign which consists of line sign 3a. The said sign other than line sign 3a, may be projection and the cavity etc. Because of this, it can verify the direction of the hole which the artificial bone has and orientation does substantially unidirectionally easily.人工骨の空孔の向きを、容易かつ正確に知ることができるようにする。人工骨10は、人工骨材料(人工骨本体)1の内部に実質的に一方向に配向した空孔2を有し、表面に一軸方向に配向する空孔2の配向方向を示す、例えば、線記号3aからなる標識を付す。該標識は線記号3aの他、突起や窪み等であってもよい。これにより、人工骨が有する実質的に一方向に配向した空孔の向きを容易に確認することができる。
