The authors employed a daily diary method to assess daily frequencies of interparental and parent-adolescent conflict over a 2-week period and their implications for emotional distress across the high school years in a longitudinal sample of 415 adolescents from Latin American, Asian, and European backgrounds. Although family conflict remained fairly infrequent among all ethnic backgrounds across the high school years, its impact on emotional distress was significant across ethnicity and gender. In addition, parent-adolescent conflict significantly mediated the association between interparental conflict and emotional distress. These associations were observed at both the individual and the daily levels, providing evidence for both the chronic and episodic implications of family conflict for adolescents' emotional adjustment. (Contains 1 figure and 3 tables.)