Ankylosis of the temporomandibular joint (TMJ) is an extremely disabling affliction. TMJ ankylosis is most commonly associated with trauma (13-100%), local or systemic infection (10-49%), or systemic disease (10%). We are presenting 13 yr old female unilateral TMJ ankylosis due to burn injury at age of four years treated conservatively. Burn injury at early age and lack of jaw physiotherapy with subsequent fibrosis and contracture favoured development of ankylosis.