Background and objectives: The most common cause of death in the people (1-44 years old) is trauma and it ranks third as the cause of death in all ages. Road and city accidents with motor vehicles and its effects consist 50% of trauma cases. The mortality rate in traffic accident shows the depth of traffic event, but in any way most of the victims can be saved and we can prevent many of these accidents. The accident is of greater importance in especially developing countries like our country, because in addition to losing a great number of active economic and social power, it causes damage in the corpus of the community, in a way that these accidents cost more than 3% of country in gross productions.

  Methods: This investigation which is considered as a descriptive study is in order to do an epidemiologic investigation of accidents that have led to death in Ardabil Province from Farvardin 2002 to Farvardin 2003 through collected data from Ardabil’s legal medicine center and was analyzed through SPSS.

  Results: The analysis of collected data consisted of 272 cases of events, shows that most of them are male (82%) and they are 21-30 years old. The existence of inversed relation ship with educational level and mortality rate was one of the other findings. Also it became clear that most of the vehicles were small vehicles (70.6%) and most of the victims were pedestrians (34%). Accidents rate in road was 63.6% and accidents in the cities 36.4%, and most of them have happened in summer (38.2%). Most of the mortalities took place in the first minutes and at the same place of accident (50%) and mortality cause of most people was multiple traumas (48.5%) and Brain injuries (46.6%).

  Conclusion: Factors influencing the rate of death in accidents are as followings: male, age (21-30), low education level, summer, and small vehicles. The main causes of death in accidents are multiple trauma and head injuries.