The present invention relates to a drill for implant surgery drill for implant surgery, including: a drill connecting part 10 having a drill top portion 11 formed at one side of the top portion thereof, a drill fixing groove 12 formed on the lower portion of the drill top portion 11, and a drill connecting body 13 formed on the lower portion of the drill fixing groove and a drilling part 20 disposed on the underside of the drill connecting part 10 and having a cylindrical shape in such a manner as to be small in diameter toward the lower portion thereof and to have a space portion formed at the inside thereof, the drilling part 20 having a plurality of side piercing portions 22 equally spaced apart from each other along the outer periphery thereof in such a manner as to be pierced into the space portion formed at the inside thereof, a plurality of side bone cutting blades 21 formed along one side edges of the plurality of side piercing portions 22, and a toothed lower bone cutting blade 30 formed along the end periphery of the lower portion thereof.
