The aim of this study was to determine various times related to the ambulance activities of Ankara Emergency Aid and Rescue Services (EARS) and if necessary contribute to the improvement of them. A descriptive study was planned to determine various times related to the ambulance activities of Ankara EARS. The data was collected by one of the researchers. The study was conducted between 1 October 1995 and 30 September 1996. The variables of the study were: delay time, response time, time at the scene (scene time), round trip time, transport time and total run time of Ankara EARS ambulance activities. Ankara EARS Emergency Call Registry Forms (5638 forms) were evaluated for the above stated variables. The computer program EPI-INFO 5.0 was used in the study. The median response time of Ankara EARS was found to be 9 minutes. In the research year, the median delay time was 2 minutes. Median arrival to patient contact time of Ankara EARS was 2 minutes. Median time at the scene was 7 minutes. Median round trip time of the system was 44 minutes. The median time to arrive at the scene from the ambulance station was 8 minutes. The median transport time was 10 minutes. The median total run time was 30 minutes. As the median response time was found to be 9 minutes it is concluded that there should be more ambulance vehicles to improve this time of Ankara EARS. Due to financial problems, times were recorded manually by the ambulance crew and dispatchers of Ankara EARS. If digital and electronic recording systems are used, these times might be more precise.