Laurence-Moon-Biedl syndrome is an autosomal recessive disorder characterized by obesity, hypogenitalism, polydactyly, mental retardation and retinitis pigmentosa. Occasionally, this syndrome is accompanied by renal anomaly, nystagmus, cataract, syndactyly, microcephaly, oxycephaly and congenital heart disease. Recently, we have experienced a 8-year-old female patient who has retinitis pigmentosa, obesity, and polydactyly. We report a case of Laurence-Moon-Biedl syndrome with a review of literature.