The implant driver is equipped with a centering shaft portion of the taper-shaped outer diameter is reduced toward the distal end, and a rotation transmission shaft portion formed in non-circular. The centering shaft portion is fitted into a fitting hole of the tapered shape whose inner diameter is reduced toward the depth direction is formed in the center hole of the fixture. The rotation transmission shaft portion is fitted into a rotation preventing hole formed in the center hole of the fixture to prevent rotation of the abutment is connected to the fixture.
