Abstract: Disclosed herein is a self-ligating orthodontic bracket assembly. The self-ligating orthodontic bracket assembly includes: a body block including a base, a pair of guide walls, and a stopper wall in an integrated manner; a ligating block configured to be slidably coupled to the sliding portion so that the archwire slidably inserted and seated into the seating groove is selectively ligated and released in a seated state, and provided with a fitting depression formed by recessing the bottom of the ligating block upward and a guide depression formed through upward recessing to form a step at a location away from one end of the fitting depression; and a ligating means including a temporary assembly protrusion and a complete assembly protrusion successively formed on the sliding portion, and a retainer configured to selectively ligate and release the archwire in cooperation with the temporary assembly protrusion and the complete assembly protrusion.