Dentigerous cysts are the developmental cyst of odontogenic origin caused by the accumulation of fluid between the reduced enamel epithelium and the crown of an unerupted tooth usually in the second and third decade of life. It surrounds the crown of the unerupted or impacted tooth. It has a prevalence of 22.6% overall and 4-9% among children up to 10 years whereas radicular cyst shows a prevalence of 54.7%. In this article, a case of rare occurrence of dentigerous cyst in a 10-year-old child and its treatment are presented. The dentigerous cyst was fully enucleated and the deciduous second molar and permanent second premolar tooth was removed from the mandibular right premolar region.