Emergency Medical Service is part of health system whose work is conducted in specific and unpredictable conditions. Emergency service is based on the organization, expertise, and humanity that is needed in dealing with patients. Emergency work takes place in unpredictable and specific conditions. During work it is necessary to think about the safety of the patient but also about the safety of the whole team. Any emergency with which an emergency medical service worker may encounter in his work, has prescribed algorithms that are being handled. In my work I will explain the procedures and specifics of cardiopulmonary resuscitation in emergency medical service. The basic tool for work is a medical vehicle that contains equipment prescribed by the regulations on minimum conditions of emergency work. An important segment in out-of-hospital emergency service has a call-in-office unit in wich dispatchers receive and categorize calls. The speed of the reaction of the emergency service team depends on their assessment. Interventions of category I, the urgency of which are endangered, require a quick and immediate response. Suprise death is often a reason for making a call to on emergency service. When arriving at the intervention site, an examination of the affected person begins with the ABCD approach. The problems encountered during the examination are solved by certain interventions necessary for their care, such as opening the airway, aspiration and endotracheal intubation. Cardiopulmonary resuscitation requires educated staff and skill to quickly and efficiently carry out. Guidelines prescribed by the European Society for Reanimation are use din cardiopulmonary resuscitation of adults, children and traumatized patients.