Relational proprietariness and entitlement have been theoretically related to partner violence following the threat of relationship dissolution. To date, however, no measure has been employed to verify such accounts. A multistage item pool development and refinement strategy was employed, resulting in a 32-item measure with strong construct validity. An online survey administered to 279 students resulted in an interpretable factor structure of sexual proprietariness and entitlement, consisting of social, behavioral, and information control, and a potential factor of face threat reactivity. These factors added unique variance to the prediction of instrumental and expressive aggression, were related to self-esteem and attachment, and were not contaminated by social desirability. Recommendations for bolstering the face threat reactivity factor and future studies are suggested. This measure provides a new tool that contributes to the prediction of intimate partner violence.