A self-ligation type dentition-correcting bracket assembly has a ligation slide movably installed on a bracket body so as to expose/cover a slot provided such that a tooth-correcting wire is seated on the bracket body, and comprises a clamping portion for constraining the bracket body and the ligation slide in a complementary manner. The clamping portion comprises a pin member provided on the bracket body and arranged in the range of movement of the ligation slide and a retainer provided on the ligation slide such that the same can be coupled to the pin member in a complementary manner. In connection with the bracket assembly, the retainer and the pin member are attached to/detached from each other in a complementary manner as the ligation slide moves. Ligation of the wire, which is inserted into the slot, and release thereof occur selectively. Operation of a dentition-correcting arch wire ligation slide can be manipulated in a one-touch type.
