Introduction: One of the most important public health threats in the world today, is driving accidents and Iran is among the countries that in driving accidents and loss of life is huge. While 90 to 95 percent of road accidents are caused by human factors. Risky driving behaviors, the second leading cause of death and the first cause of years of life lost due top re-mature death and disability in iran considered. Meanwhile, some of the driver personality characteristics have an important share in intensifying or weakening of risky driving behaviors that most important of them are sensation seeking, angry, aggressive and has -mental health. The purpose of this paper is to present the realism descriptive of risky driving behavior in Mashhad, with a focus on the four personality characteristic, identify processes of risky driving intensifying or weakening.