Provided is a dental implant fixture. The dental implant fixture includes: a body portion having an outer wall on which a threaded portion to be placed in an alveolar bone is formed; an abutment contact and support portion formed on an inner wall of the body portion at an entrance side, to which an abutment is coupled and supported in contact therewith; and an internal connection part formed on the inner wall of the body portion in an area where the abutment contact and support portion ends in a direction in which the body portion is placed in the alveolar bone, and having a non-circular cross-sectional structure to allow a predetermined tool for rotational handling of the body portion to be optionally connected thereto.