The present invention relates to a dental implant, and more particularly, to a dental implant in which a fixture and an abutment are together by a separate screw post so as to prevent the breakage of an implant screw tightening part and uniformly transmit forces over the entirety of a contact surface, to thereby 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 the fixture and the abutment and fundamentally prevent a screw from becoming loosened. The dental implant of the present invention comprises said fixture and abutment, the 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.
