The Rejection Sensitive Expectation, Perception, and Reaction Questionnaire—Partner (RSEPR‐P) was developed to assess rejection expectation, perception of rejection, and reactions to perceived rejection among intimate partners. This article details the construction and validation procedures, including item pool generation, factor analysis, and the estimation of reliability and validity. The researchers examined the psychometric properties of RSEPR‐P in a community sample of 151 participants. Confirmatory factor analysis (CFA) with the final 24 items suggested four‐factor loading with each subscale loading on a separate factor. The subscales had good to excellent internal consistency. In support of the convergent validity, RSEPR‐P exhibited robust correlations with rejection sensitivity‐personal, mindfulness, marital adjustment, and self‐esteem measures. A 6‐month test–retest reliability was established. RSEPR‐P is proposed to have potential therapeutic and research utility.