(from the chapter) In this chapter we examine the influence of victimization exposure on suicidal ideation in a clinical sample of adolescents. 11-17 year-old subjects were recruited from the Child and Adolescent Mental Health Outpatient Services. They completed the Self-Injurious Thoughts and Behaviors Interview, the Life Events Stress Scale, the State-Trait Anger Expression Inventory, the Children’s Depression Inventory, the Strengths and Difficulties Questionnaire, and the Family APGAR. Demographic data, developmental features, medical and psychiatric history, family history, and treatment histories were also evaluated. A backward stepwise logistic regression analysis was conducted to examine the influence of victimization exposure on suicidal ideation controlling for potential confounding variables. 239 adolescents (62.3% male; mean age 14.31 years, Sd = 1.9) took part in this investigation. 20.9% of them reported victimization exposure. Adolescents who experienced peer victimization and/or were victims of a crime were significantly more likely to report suicidal ideation. However, suicidal ideation was only predicted by emotional and behavioral problems, depressive symptomatology and number of total stressful life events. Behavioral and emotional problems, as well as the accumulation of stressful life events may have a direct relation to suicidal ideation among adolescents evaluated at Mental Health Services. Future studies might consider a comprehensive assessment of victimization and the cumulative effects of exposure to multiple stressful life events. Longitudinal designs are warranted.