Cardiopulmonary resuscitation in outpatient emergency medical service includes measures of advanced life support. During advanced life support, an essential feature is adequate airway management for a better resuscitation outcome and less frequent post-resuscitation complications. There are several methods for airway management, including endotracheal intubation. Aim of the study: The aim of the study was to determine the frequency of endotracheal intubation in the outpatient emergency service of the Istrian County, and whether the airway was managed with endotracheal intubation more common then with other methods. Subjects and methods: The study included a total of 1242 subjects from the Istrian County who were cardiopulmonary resuscitated by the outpatient emergency medical service, in period from 2015 to 2019. Results: Out of a total of 1242 subjects who were cardiopulmonary resuscitated, only 274 had airway managed by endotracheal intubation. The number of endotracheally intubated subjects decreased from 2015 to 2017, what is expected because of the decrease in the total number of CPR in these years. From 2015 to 2019, the return of spontaneous circulation was achieved in 284 subjects, of which only 58 were endotracheally intubated. Conclusion: The frequency of endotracheal intubation in outpatient emergency medical services is lower than other airway management methods. Most subjects with ROSC were not endotracheally intubated.