Survivors of car accidents not only are physically challenged, but also from psychological trauma, such as post-traumatic stress disorder (PTSD) also suffers. In recent years, PTSD disorder and other psychological reactions is increased after an accident. PTSD is a Disorder with special signs after stressful events such as accidents can be seen psychological. PTSD is common responses that people show in stressful or traumatic events. This disorder includes symptoms such as frequent reminders of the traumatic memories, re-experiencing traumatic dream and waking, persistent avoidance of reminders accident and etc. Usually the person after repeated and unwanted exposure to catastrophic incidents in his mind or when is placed in a position that is reminiscent of what happened, feels the tension and anxiety and behaves as if the event is happening at the moment. The prevalence of PTSD after traffic accidents have been reported in different studies 1 to 46 percent. Considering the importance of early diagnosis and early treatment of psychological disorders in survivors of car accidents and the need for urgent intervention to prevent psychological impact of the disaster on these people are recommended. This study is aimed to investigate the causes and symptoms of PTSD  in survivors of the car accident.