Disclosed is a dental implant, in which a fixture and an abutment are together by a separate screw post so as to prevent a breakage of an implant screw tightening part and uniformly transmit forces over the entirety of a contact surface, to prevent stresses from being partially concentrated, and in which the screw-tightening direction between the fixture and the abutment is variable so as to improve the coupling force between them and fundamentally prevent a screw from becoming loosened. The dental implant includes a fixture and abutment, an abutment including a lower abutment to be fitted onto the fixture, and an upper abutment connected to an upper portion of the lower abutment, the lower abutment and the upper abutment being separate from each other. The upper abutment and the fixture are coupled and fixed by the screw post.
