The invention is a stirrup-type ankle brace that is designed to effectively perform two functions when applied to either a right extremity or a left extremity: 1) dispersal of swelling associated with an ankle sprain, and 2) restraint of excessive joint displacement that would otherwise impose stress on the ankle ligaments. The unique characteristic of the invention is its adaptability to differing anatomical contours on the medial (inner) and lateral (outer) aspects of the right and left extremities, which is achieved through multiple pivoting connections between semi-rigid brace components and adjustable-tension straps, along with symmetrical relationships between all brace components. Thus, the positioning of the moveable and adjustable brace components can be altered to produce either one of two mirror-imaged configurations.