Chemodectomas are malignant or benign neoplasms of chemoreceptor cells, which are commonly located in the base of the dog’s heart. This paper reports a case of chemodectoma in an 11 years old male dog of Fila Brasileiro breed, in Uberaba city. The animal has a frequent cough, dyspnea and members edema. Carotid body chemodectoma was diagnosed on lung areas, liver, spleen and pancreas metastases. The chemodectoma causes still unknown, but most of affected animals, has a chronic respiratory disease, associated with the neoplasms.