This research examines the mixed work-to-family spillover effects of unethical pro-organizational behavior. Drawing on conservation of resources theory and the work–home resources model, we develop a dual-pathway model to explain such effects. Based on a three-wave field study involving 214 respondents in China, we find engagement in unethical pro-organizational behavior to be positively associated with employees’ organization-based self-esteem and stress at work, which in turn, leads to work-to-family positive spillover and work-to-family conflict, respectively. We also find that performing tensions moderate the mixed effects of unethical pro-organizational behavior on organization-based self-esteem and work stress and the indirect effects of unethical pro-organizational behavior on work-to-family positive spillover and work-to-family conflict. Our findings have theoretical implications for business ethics scholars and practical implications for managers.