The purpose of the current study is to investigate social support (from parents, classmates, teachers, and close friends) as a protective factor in the association between depression and suicidal ideation. Data on students' levels of social support, depression, and suicidal ideation were collected from 399 9th-grade students using the Child and Adolescent Social Support Scale (CASSS), the Children's Depression Inventory, 2nd Edition Short Version (CDI 2), and the Suicidal Ideation Questionnaire-Junior Version (SIQ-JR). Results of hierarchical linear regressions indicated parent, classmate, and close friend social support buffered the association between depression and suicidal ideation. Close friend social support as a buffer appeared to be more robust for girls. Implications concerning these findings are discussed.