Coparenting is examined as an explanatory link between marital conflict and parent-child relations in 2-parent families. Data were collected from 3 samples (pilot sample, n = 220 mothers; preadolescent sample, n = 75 couples; preschool sample, n = 172 couples) by using the Coparenting Questionnaire (G. Margolin, 1992b) to assess parents' perceptions of one another on 3 dimensions--cooperation, triangulation, and conflict. Main effects for child's age and for parents' gender were found for cooperation, and an interaction between parent and child gender was found for triangulation. Regression analyses were consistent with a model of coparenting mediating the relationship between marital conflict and parenting. Discussion addresses the theoretical and clinical importance of viewing coparenting as conceptually separate from other family processes.