The aim of the current descriptive study was to examine perceived characteristics of aggressiveness of youth school's students who received disciplinary punishment for violence and youth school's students who not received disciplinary punishment for violence. Youth schools provide learning opportunities for students who fail in conventional schools because they required specialized attention not available in the conventional school. The analysis covered 178 youth school's students, which were randomly selected from different youth schools in Kaunas region. The study used two surveys: Assinger's questionnaire and Buss-Perry Aggression Questionnaire. The data in the Assinger questionnaire were found to be different from the normal distribution. Statistical analysis of these data was performed using the chi-square test. The data of the Buss and Perry's Aggression Questionnaire were normally distributed, thus making it possible to use t-test for independent samples. Youth school's students who received disciplinary punishment for violence had more positive attitudes toward aggression, i.e., they tend to justify the aggression partly or approve completely. Youth school's students who received disciplinary punishment for violence were more verbally and physically aggressive than youth school's students who not received disciplinary punishment for violence. The findings of the present study point out new trends to a deeper understanding of the peculiarities of aggressiveness among youth school's students.