Parental hostility can generate in children the formation of thinking and action styles that put them at risk of developing socially maladaptive behaviors. An ex post facto quantitative de-scriptive-correlational study was carried out to analyze aggressive behaviors in Colombian ju-venile delinquents and their relationships with the same behaviors in their fathers and moth-ers. A total of 115 male juveniles (with their mothers and fathers) who were in pretrial de-tention for different offenses participated. Five self-reports were applied to measure differ-ent forms of aggressiveness in the youths, their mothers and fathers. Except for hostility, the youths had higher scores than their mothers and/or fathers in all other forms of aggression. Regarding appetitive aggression, youths and their fathers had higher scores than their moth-ers. Multiple correlations were found between the different forms of aggression of youths, mothers and fathers.