Social exclusion is a phenomenon that particularly affects children. Growing up in environments at risk of social exclusion can affect social competence or the ability to cope with social situations successfully. The aim of the study was to analyze in a Spanish population whether living at risk of social exclusion is related to socialization problems, with a lesser ability to solve interpersonal problems and/or behavioral problems. The analysis takes into account the sex modulating function in this regard. The participants were 126 adolescents between 13 and 17 years, 40 of which had a report issued by the Social Services and Child Protection. All were evaluated with tests of socialization, resolution of interpersonal problems and behavioral problems. The results showed that participants with social report underperform in interpersonal solving problems skills and behavior problems compared to children without a report.