AbstractObjectiveRelationship obsessive‐compulsive disorder (ROCD) symptoms, which include obsessive preoccupation, doubts, and compulsive behaviors focusing on the suitability of the relationship and/or partner, have been receiving increasing clinical, theoretical, and empirical attention. This clinical variant of OCD is associated with significant functional, personal, and dyadic consequences. ROCD symptoms have also been linked to several cognitive vulnerability factors, such as maladaptive relationship catastrophization. However, little is known about the connection between ROCD symptoms and specific personality traits. In this study, we examine whether vulnerable narcissistic personality traits may constitute a general vulnerability factor for ROCD symptoms. Specifically, we assess whether partner value self‐contingencies moderate the association between vulnerable narcissistic traits and obsessive preoccupation with a romantic partner's perceived flaws.MethodA total of 310 individuals self‐reporting ROCD symptoms completed questionnaires assessing narcissistic personality traits, ROCD symptoms and cognitions, and partner value self‐contingencies.ResultsVulnerable narcissistic traits were uniquely associated with ROCD symptoms over and above ROCD‐related cognitions. Self‐worth contingent on the partner's perceived value partially mediated the effect of vulnerable narcissistic traits on ROCD symptoms.ConclusionResults supported the role of vulnerable narcissistic traits and domain‐relevant self‐vulnerabilities on obsessive preoccupation with romantic partners' perceived flaws. Further research is needed to explore the susceptibility of vulnerable individuals to the development and maintenance of ROCD symptoms.