An implant for bone-graft insertedly placed in a procedure pore, the implant includes a bone organism having a lump shape, and a protective film coated to cover an overall outer surface of the bone organism as to form an absorbent membrane. After the implant is insertedly placed in the procedure pore, the absorbent member is absorbed into a body and dissolved as time passes. The implant for the bone-graft may be applied to diverse procedures performed for hone-graft not only in a dental surgery but also in orthopedics or a plastic surgery.