Individual differences in attachment bonds may influence the performance of mate retention behaviors. Because anxiously attached individuals are hypervigilant to partner rejection cues, we hypothesize that individuals higher in anxious attachment will perform more frequent mate retention behaviors. Because avoidantly attached individuals evade intimacy with their partners, we hypothesize that individuals higher in avoidant attachment will perform less frequent mate retention behaviors. Participants (N = 469) in a romantic relationship completed measures of romantic attachment and mate retention behaviors. The results provide support for the study hypotheses but also reveal that avoidantly attached women perform more frequent mate retention behaviors that deter intrasexual rivals. We discuss limitations of this research and highlight directions for research on romantic attachment, mate retention behaviors, and infidelity.