Abstract: The novel air pressure knee brace apparatus is comprised of a unit that is capable of allowing the user to provide the amount of support pressure that he or she desires for the knee joint. The apparatus is comprised of a flexible material wrap that is designed to fit around the knee of an individual. The rear portion of the wrap can be made of a mesh material that permits a cooling of the leg area. The frontal portion of the material contains an air bladder retained in position by a mesh perimeter and overlay and contains an air valve that can be inflated as desired to provide the needed support for the knee joint and, at the same time, allow for freedom of motion of the knee joint. Adjustment units are attached to the apparatus to permit tightening or loosening of the entire apparatus around the leg.