Based on the responses of 5,557 Chinese secondary students in Hong Kong, the relationship among social problem solving, perceived family functioning, and suicidal ideation were examined in this study. Results showed that suicidal ideation was negatively related to social problem solving and family functioning. It was further found that the linkage between social problem solving and adolescent suicidal ideation was stronger under high family functioning relative to low family functioning, thus suggesting the moderating effect of family functioning on the effect of social problem solving on suicidal ideation. The theoretical and practical implications of the findings are discussed.