The work of doctors, nurses and drivers in emergency medical service is exceptionally difficult and requires high level of knowledge, skills and first of all, responsibility. Approach and treatment of patient whose life is threatened because of a sudden injury or disease is one of the hardest moments in work of every nurse. Lot of colleagues around the Croatia have been working for years in emergency medical service without any special preparation and extra education, gaining knowledge and skills only during their work. Experience is certainly irreplaceable but this is not enough. Uniformed and quality medical care for injured people around Croatia is achieved by reorganization of emergency medical service. County institutes are introduced with Team 1, Team 2 and MPDJ so care for patients is assured in 80% of calls within 10 minutes from call, in urban environment, and within 20 minutes from call in rural environment. Medical personnel is provided with progress in their activities, and general population is provided with information about how to act in first moments of an accident and how to help to injured people before emergency medical service has arrived. This is achieved through various educational programs. Mutual cooperation, confidence and good communication within the team are of immeasurable importance. Emergency medical service presents team work, that is as strong as the weakest link. The result of well trained team is quick reaction and high quality care of patient.