Heterotopic bone formation occurs in approximately 2% of severe burn cases. It occurs most frequently around the elbow. It is not related to the burn location, rather it is related to degree of burns and length of confinement. Although bony encasement of the ulnar nerve is frequently found, ulnar nerve compression by postburn ectopic ossification is very rare. Early anterior transposition of the ulnar nerve is recommened to prevent progressive neurologic loss. We report a case of cubital tunnel syndrome by postburn ectopic ossification with brief review of pertinent literature.