This randomized, controlled study examined the effectiveness of Child Parent Relationship Therapy (CPRT) in school settings with 48 low-income Latino immigrant parents whose children were identified with behavioral concerns. Results from a 2 (group) x 2 (measures) split plot analysis of variance indicated that parents who participated in 11 weeks of CPRT reported statistically significant decreases (p less than 0.001) in child behavior problems and parent-child relationship stress. Large treatment effects were demonstrated for all dependent variables. Clinical significance of findings and cultural considerations are discussed. (Contains 2 tables.)