Drills for dentistry, which, in a dental implant treatment, enables two or more holes to be bored at a predetermined angle and interval in a minute space in which a single tooth grows and enables treatment to be performed precisely and rapidly regardless of a skill level of a dentist, wherein an arrangement is provided where a first member provided with a drill body and a second member provided with a fixing needle intersect slid-ably at a predetermined angle, the drill body is installed in a direction perpendicular to an axial direction of the first member with its tip facing a direction in which the fixing needle is provided, the fixing needle is installed in a direction perpendicular to an axial direction of the second member with its tip facing a direction in which the drill body is provided, the drill body bores a first hole, bored obliquely with respect to a natural tooth growing direction, and a second hole facing the first hole mutually at a predetermined angle, and the second hole is bored by the drill body upon inserting the fixing needle in the first hole, fixing the second member to the jawbone, and sliding the first member with respect to the second member, fixed to the jawbone, as a reference.
