IntroductionConflict resolution in romantic relationships is a critical skillset that relates to individual and relational well-being. In adolescence, heterosexual romantic relationships are highly gendered, and norms for traditional masculinity (a bravado focused on interpersonal dominance) may be relevant in shaping how adolescents navigate disagreements. Therefore, we examined the associations between adolescents’ conformity to norms for traditional masculinity and their conflict resolution in their romantic relationships. MethodUsing a sample of 91 heterosexual adolescent couples from the Southwest United States (Mage = 16.50, SD = .90; 44% White, 42% Latinx), we examined how self-reported conformity to traditional masculinity predicted independent observer ratings of negotiation, coercion, and avoidance strategies during a lab-based conflict and jealousy discussion task. ResultsResults of actor-partner interdependence models (APIMs) indicated that more highly masculine adolescents generally displayed less conflict negotiation and more coercion during the discussion task. Dyadic and gendered patterns characterized masculinity's associations with negotiation and coercion. Masculinity was unassociated with conflict avoidance. ConclusionsAdolescents in heterosexual relationships that adhere more rigidly to gendered norms for traditional masculinity may be challenged in acquiring skills for constructive conflict resolution with a romantic partner. Adolescent romantic relationships are a socialization context in which many individuals develop the skills for future romantic relationships, including those into young adulthood. Addressing masculine gender roles in adolescence may help promote the development of positive conflict management and overall romantic functioning in youth.