Langerhans cell histiocytosis is a rare disorder, usually occurring in children and young adults. A five year old male child presented with ulcers in lower left alveolar ridge with mobility of adjacent teeth of four months duration. After all relevant radiological and histopathological investigations final diagnosis of multicentric langerhans cell histiocytosis stage - II was made. The patient was put on chemotherapy with CHOP (Cyclophosphamide, Adriamycin, Vincristine and Prednisolone) regimen three weekly for eight courses. Now after six months of cessation of chemotherapy, the patient is in complete clinical remission.