Deprivazione relativa e identità sociale - This work analyzes the relationships between the Relative Deprivation Model and the Social Identity Theory. In the first part, different definitions of the concept of relative deprivation are presented, as well as its different typologies. In the second part, the theoretical and empirical links between the Relative Deprivation Modell and the processes of social identification are examined. Finally, the importance of the relationship between the two theories for the prevision of interindividual and intergroup strategies in social comparison is highlighted.