Gingival fibromatosis is a rare and heterogeneous group of disorders that develop as slowly progressive, local or diffuse enlargements within marginal and attached gingiva or interdental papilla. In severe cases, the excess tissue may cover the crowns of the teeth, thus causing functional, esthetic, and periodontal problems such as bone loss and bleeding, due to the presence of pseudo pockets and plaque accumulation. Hereditary, drug-induced, and gingival overgrowth has been reported. Idiopathic gingival fibromatosis can occur as an isolated condition or as part of a genetic syndrome. The pathologic manifestation of gingival fibromatosis comprises an excessive accumulation of extracellular matrix proteins, of which collagen type I is the most prominent. This report presents a case of a 30-year-old female, with a chief complaint of overgrowth of gingiva and irregularly placed teeth who was diagnosed with Idiopathic gingival fibromatosis. This diagnosis has been based on clinical examination after ruling out family, drug, and medical history.