The article presents a clinical case of surgical treatment of dirofilariasis in the maxillofacial region in a child. Diagnosis is difficult due to the complex mechanism of transmission, long incubation period and polymorphism of symptoms. The method of ultrasonic diagnosis allows the most accurate and clear verification of the diagnosis (the presence of a dense capsule, in the lumen of which linear hyperechogenic moving structures are determined). Treatment of dirofilariasis is only surgical — excision of the capsule with the helminth within healthy tissues with subsequent pathomorphologic examination and clarifying of the etiology of the parasite.