Respiratory epithelial adenomatoid hamartoma (REAH) is an uncommon benign lesion of the nasal cavity and paranasal sinuses with an unclear etiology. Although rare, REAH should be considered in the differential diagnosis of nasal lesions. Limited but complete surgical resection is the treatment of choice. We present a 54-year-old male patient with REAH in the left nasal cavity, with differential diagnoses including antrochoanal polyp and inverted papilloma.