A dental implant fixture (100, 200) comprising: a body (120, 220); a continuous thread part (130, 230) continuously formed in a spiral shape along an outer circumferential direction of the body (120, 220); and a bone damage prevention part (170, 270) formed at one end portion of the body (120, 220) and preventing an alveolar bone existing in an opening area of a hole where the dental implant fixture (100, 200) is implanted from being damaged due to the continuous thread part (130, 230), wherein the bone damage prevention part (170, 270) is provided in a non-threaded region where the continuous thread part (130, 230) is not formed at an outer surface of the one end portion of the body (120, 220) and integrally formed in the body (120, 220) by a predetermined length in the one end portion of the body (120, 220), characterized by an entrance guide part (160, 260) provided in a non-threaded region at the other end portion of the body (120, 220) opposite to the bone damage prevention part (170, 270), formed as long as 1 mm to 3 mm in a lengthwise direction of the body (120, 220) from the leading end portion of the body (120, 220) with respect to a direction in which the body (120, 220) is implanted and guiding the body (120, 220) in an initial implantation entrance direction, wherein the entrance guide part (160, 260) includes a flat portion forming a flat surface perpendicular to the lengthwise direction of the body (120, 220), an inclined portion extending toward the one end portion of the body (120, 220) from a circumference of the flat portion, a radius of the inclined portion increasing in the direction of the one end portion of the body (120, 220), and a rounded portion connecting the inclined portion and the continuous thread part (130, 230) and having at least one area inwardly rounded toward a center line of the fixture. a body (120, 220); a continuous thread part (130, 230) continuously formed in a spiral shape along an outer circumferential direction of the body (120, 220); and a bone damage prevention part (170, 270) formed at one end portion of the body (120, 220) and preventing an alveolar bone existing in an opening area of a hole where the dental implant fixture (100, 200) is implanted from being damaged due to the continuous thread part (130, 230), wherein the bone damage prevention part (170, 270) is provided in a non-threaded region where the continuous thread part (130, 230) is not formed at an outer surface of the one end portion of the body (120, 220) and integrally formed in the body (120, 220) by a predetermined length in the one end portion of the body (120, 220), characterized by an entrance guide part (160, 260) provided in a non-threaded region at the other end portion of the body (120, 220) opposite to the bone damage prevention part (170, 270), formed as long as 1 mm to 3 mm in a lengthwise direction of the body (120, 220) from the leading end portion of the body (120, 220) with respect to a direction in which the body (120, 220) is implanted and guiding the body (120, 220) in an initial implantation entrance direction, wherein the entrance guide part (160, 260) includes a flat portion forming a flat surface perpendicular to the lengthwise direction of the body (120, 220), an inclined portion extending toward the one end portion of the body (120, 220) from a circumference of the flat portion, a radius of the inclined portion increasing in the direction of the one end portion of the body (120, 220), and a rounded portion connecting the inclined portion and the continuous thread part (130, 230) and having at least one area inwardly rounded toward a center line of the fixture.