An intervertebral fusion device is disclosed, which includes a main body and at least one engagement element. Wherein the main body has at least one engaging groove recessed on the surface of the main body the at least one engaging groove has two abutting faces facing opposite to each other and at least one recessed groove installed between the two abutting faces facing opposite to each other the at least one engagement element is connected to the abutting faces of the least one engaging groove, so that the at least one engagement element and the at least one recessed groove of the at least engaging groove form at least one hole therebetween. Therefore, when the fusion device is loaded with skeleton and the body weight, through the at least one hole, the device is able to provide a tolerance space generated by a micro flexible deformation of the engagement element that has been exerted with a force, hence, more load stress is acting in the bone grafting zone for facilitating bone fusion.本發明提供一種椎間融合裝置,其包含一本體以及至少一卡合件。其中該本體包含至少一凹陷於該本體表面的卡合槽;其中該至少一卡合槽包含兩相對抵靠面以及至少一設於兩相對抵靠面之間的凹溝;該至少一卡合件,其係與該至少一卡合槽的該等抵靠面相連接,使該至少一卡合件與至少一卡合槽之至少一凹溝之間形成至少一孔洞。當本發明之椎間融合裝置於負載骨骼與體重時,可藉由該至少一孔洞提供該卡合件因受力產生微彈性變形之容許空間,進而使更多負載應力作用於補骨區域,以促進骨融合進行。10‧‧‧本體20‧‧‧卡合件
