Abstract: A stirrup-type ankle brace having an outer shell member, the shell member having a lateral elongated, substantially rigid, support member with a corresponding supporting cushion thereon substantially coextensive therewith and an opposed medial support member with a corresponding cushion thereon. The lateral supporting cushion has a pre-inflated flap extending the anterior margin of its distal end with enough width to cover the area over and surrounding the anterior talofibular ligament. The flap is compressed against the ATF by a strap of elastic hook-and-loop compatible material. A tab of hook material is attached to the anterior end of the elastic strap so that it can engage the opposite end at any length. The strap is retained between the lateral shell and supporting cushion in the preferred embodiment so as to overlap the flap and compress the ATF ligament and medial malleolus when wrapped around the ankle.