Dysphagia is a common symptom in otolaryngology, but neuromuscular causes are rarely diagnostic hypotheses to be considered. The Myasthenia Gravis is an autoimmune disease which is characterized by muscle weakness that can affect the muscles of the face, oral cavity, pharynx or esophagus and may present with swallowing disorders. The authors present the case of a 68-year-old man who went to the emergency department of otolaryngology complaining of dysphagia. After the examination and diagnostic exams, it was diagnosed as Myasthenia Gravis. The authors conclude that the clinical suspicion should not be forgotten in order to initiate timely treatment to the effective control of the disease and complement with functional tests according to the complaints, so that it can be followed up and start rehabilitation of the patient.