Perfectionism is a multidimensional personality construct that has been linked with various forms of maladjustment. Perfectionism is commonly conceived of as a personality style characterized by striving for flawlessness and setting of excessively high standards for performance accompanied by tendencies for overly critical evaluations of one’s behavior. The purpose of this study was to examine the relationship between perfectionism and aggression in male football players in Iran. A total of 138 male football players (age 23.75±3.51 years old; body height 177.72±6.73 cm and body weight 74.68±12.77 kg) completed the surveys. Three kind of personal information, Sport Multidimensional Perfectionism Scale and Bredemeier Athletic Aggression Inventory were used to collect the information. In order to analyse the data were used descriptive and inferential statistics. The result of research showed that: there was a significant association between the concern over mistakes dimension of perfectionism and the hostile aggression(r=0.824; p<0.05). No other dimensions of perfectionism (personal standards, perceived parental pressure and perceived coach pressure) were found to be correlated with aggression.