Abstract: An orthotic device for the heel of a person's foot. The orthotic device includes a flexible cup-shaped body member adapted to surround the heel and adjacent portions of a person's foot when worn by the person. The cup-shaped body member includes an integral substantially solid heel cushion disposed on said body member in the vicinity of the heel of the person when the orthotic device is worn, three substantially solid rib members extending substantially longitudinally along the length of the bottom portion of the body member, and a tendon supporting portion provided on the cup-shaped body member which is adapted to surround and support a portion of the Achilles tendon when the orthotic device is worn. Relieved areas are provided on the cup-shaped body member for joining the heel cushion to the bottom portion and to the tendon supporting portion to permit limited freedom of movement of the heel cushion relative to the sole portion and the tendon supporting portion when the device is worn.