Objective: To study the prospective link between involvement in bullying (bully, victim, bully/victim), and subsequent suicide ideation and suicidal/self-injurious behavior, in preadolescent children in the United Kingdom. Method: A total of 6,043 children in the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort were assessed to ascertain involvement in bullying between 4 and 10 years and suicide related behavior at 11.7 years. Results: Peer victimization (victim, bully/victim) was significantly associated with suicide ideation and suicidal/self-injurious behavior after adjusting for confounders. Bully/victims were at heightened risk for suicide ideation (odds ratio [OR]; 95% confidence interval [CI]): child report at 8 years (OR = 2.84; CI = 1.81-4.45); child report at 10 years (OR = 3.20; CI = 2.07-4.95); mother report (OR = 2.71; CI = 1.81-4.05); teacher report (OR = 2.79; CI = 1.62-4.81), as were chronic victims: child report (OR = 3.26; CI = 2.24-4.75); mother report (OR = 2.49; CI = 1.64-3.79); teacher report (OR = 5.99; CI = 2.79-12.88). Similarly, bully/victims were at heightened risk for suicidal/self-injurious behavior: child report at 8 years (OR = 2.67; CI = 1.66-4.29); child report at 10 years (OR = 3.34; CI = 2.17-5.15); mother report (OR = 2.09; CI = CI = 1.36-3.20); teacher report (OR = 2.44, CI = 1.39-4.30); as were chronic victims: child report (OR = 4.10; CI = 2.76-6.08); mother report (OR = 1.91; 1.22-2.99); teacher report (OR = 3.26; CI = 1.38-7.68). Pure bullies had increased risk of suicide ideation according to child report at age 8 years (OR = 3.60; CI = 1.46-8.84), suicidal/self-injurious behavior according to child report at age 8 years (OR = 3.02; CI = 1.14-8.02), and teacher report (OR = 1.84; CI = 1.09-3.10). Conclusions: Children involved in bullying, in any role, and especially bully/victims and chronic victims, are at increased risk for suicide ideation and suicidal/self-injurious behavior in preadolescence. (Contains 7 tables and 1 figure.)