SUMMARY
The main objective of this research was to find the relationship between social network addiction and self-esteem in university students. Therefore, 466 students of both sexes were evaluated, between the ages of 16 and 35. The instruments used were the Social Network Addiction Questionnaire (ARS) proposed by Escurra and Salas (2014) and the Stantey Coopersmith Self-Esteem Inventory (SEI) - Adults. The research design was non-experimental and correlational. The results indicated that there is a moderate, inverse and highly significant correlation between social network addiction and selfesteem (rs=-.417^p=.000), as in all dimensions. In addition, it was found that 33.9% of university students have a low level of addiction to social networks and 36.5% have a high level of self-esteem. Similarly, all sociodemographic variables, which include sex, age, cycle and employment status, established differences in social media addiction and self-esteem.