ObjectiveTo investigate the clinical popularization and application of the superfine electronic video laryngoscope to the diagnosis of chronic cough．MethodsRhinolaryngeal electronic video endoscope (Pentax VNL1070 STK) of 3.3 mm outer diameter was used for examining 223 patients (including 135 adults and 88 children) with the sole complaint of chronic cough.ResultsThe examination was performed successfully in all 223 patients. The positive rate of adults is 42.9(58/135)while the positive rate of children is 61.4%(54/88) in 112 cases with a total positive rate of 50.2%. Among them, the proportion in nose or nasopharynx is the highest.ConclusionWith advantages of feasibility and patient’s acceptability, the superfine electronic video endoscope is worth of popularization in the diagnosis of chronic cough.