This study examined the intrapersonal, dyadic, and mediational relationships underlying romantic attachment (Experiences in Close Relationships), dyadic empathy (Interpersonal Reactivity Index for Couples), and psychological partner aggression (Revised Conflict Tactics Scales) in 193 community-based couples. In women, attachment insecurity predicted lower dyadic empathy and greater psychological aggression. In men, attachment insecurity predicted lower perspective taking, higher empathic concern, and greater psychological aggression. Partner effects were found for men, with their attachment predicting their female partner’s dyadic empathy and psychological aggression. In women, low perspective taking mediated the relationship between: (1) their anxiety over abandonment and their psychological aggression; and (2) their avoidance of intimacy and their psychological aggression. Findings are consistent with the attachment theory and clinical implications are discussed.