An orthodontic bracket comprising: a base having a bonding reference surface coming into contact with a tooth and a plurality of unit engraved patterns slant inward to given depths from the bonding reference surface to allow a bonding agent for bonding the tooth thereto to be accommodated therein; and a body provided on top of the base and having a slot adapted to insert a wire thereinto, wherein when groups of the unit engraved patterns formed in the same slanting directions as one another among the plurality of unit engraved patterns are defined as engraved pattern groups, the base has at least two or more engraved pattern groups, while the plurality of unit engraved patterns constituting each engraved pattern group are being spaced apart from one another by a given distance in at least one row, and the engraved pattern groups comprise: a first engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in a mesial direction of the tooth alignment when the base is attached to the tooth; and a second engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in a distal direction of the tooth alignment; characterised in that the engraved pattern groups further comprise a third engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in perpendicular directions to the inward slanting directions of the plurality of unit engraved patterns constituting the first and second engraved pattern groups. a base having a bonding reference surface coming into contact with a tooth and a plurality of unit engraved patterns slant inward to given depths from the bonding reference surface to allow a bonding agent for bonding the tooth thereto to be accommodated therein; and a body provided on top of the base and having a slot adapted to insert a wire thereinto, wherein when groups of the unit engraved patterns formed in the same slanting directions as one another among the plurality of unit engraved patterns are defined as engraved pattern groups, the base has at least two or more engraved pattern groups, while the plurality of unit engraved patterns constituting each engraved pattern group are being spaced apart from one another by a given distance in at least one row, and the engraved pattern groups comprise: a first engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in a mesial direction of the tooth alignment when the base is attached to the tooth; and a second engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in a distal direction of the tooth alignment; characterised in that the engraved pattern groups further comprise a third engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in perpendicular directions to the inward slanting directions of the plurality of unit engraved patterns constituting the first and second engraved pattern groups. characterised in that the engraved pattern groups further comprise a third engraved pattern group having the inward slanting directions of the plurality of unit engraved patterns in perpendicular directions to the inward slanting directions of the plurality of unit engraved patterns constituting the first and second engraved pattern groups.