This study investigated family, school, peer, & psychological factors contributing to adolescent suicide ideation. Participants were 1,358 Hong Kong Chinese adolescents divided into younger (12.3 years) & older (15.4 years) age groups. By using structural equation modeling, results showed family cohesion & sense of school belonging were the core predictors of self-esteem & depression, & that depression was a strong mediator of suicide ideation. In the prediction of suicide ideation, peer support was significant among girls & younger adolescents only, whereas peer conflict was significant among older adolescents only. Family conflict, teacher support, & academic pressure did not show any significant contribution in the prediction. (54 refs.)