The principal aim of this study was to analyze the structural dimensions of social representation of aggression through the Expressive Representations of Aggression Scale – EXPAGG (Campbell, Muncer, & Coyle, 1992). This scale is used in many studies of aggressive behavior among youth and in adolescent populations. Moreover, the EXPAGG is one of the self-report techniques most commonly used in the field of aggression research to measure expressive and instrumental attributions. This study uses various statistical procedures to analyze the data from a representative sample of adolescents in the community of Madrid to conclude that the EXPAGG is a reliable and valid test to measure different attribution styles of aggression in youth and adolescents. In addition, a tridimensional structure of social representation of aggression and a significant effect of age and gender were found.