The contributing factors of aggressive driving have been studying in the last decades. Both impulsivity and narcissism are associated with aggressive driver behaviors. Although the role of these two factors were examined in the same studies, the combined role of these two factors hasn't been studied yet. To understand the combined effect of them, in the present study, the moderated mediation model for examining the relationships of narcissism, impulsivity, and aggressive driver behavior was developed and tested. Three hundred and four participants completed an online survey battery comprised of Demographic Information Form, Five-Factor Narcissism Inventory-Short Form, Barrat Impulsiveness ScaleShort Form, and Driving Anger Expression Inventory. The moderated mediation analyses were conducted using PROCESS macro developed by Hayes and Preacher (2013). The results revealed that only the relationship between vulnerable narcissism and the use of vehicle to express anger is mediated by attentional impulsiveness. Also, this relationship is moderated by grandiose narcissism. In detail, grandiose narcissism moderates the direct effect of vulnerable narcissism on attentional impulsivity and also the direct effect of attentional impulsivity on the use of vehicle to express anger. Theoretical and practical implications of these findings and recommendations for future studies are discussed.