[Correction Notice: An Erratum for this article was reported online in Psychological Trauma: Theory, Research, Practice, and Policy on Nov 07 2022 (see record 2023-15574-001). In the original article, the second affiliation of Dawne Vogt was changed from "MGH Institute of Health Professionals, Boston, Massachusetts, United States" to "Department of Psychiatry, Boston University School of Medicine." In addition, the following sentence was deleted from the author note: "The study was funded by the National Center for PTSD." All versions of this article have been corrected.] Objective: Previous research has shown that difficulties in intimate relationships promote mental health treatment seeking for male veterans, but findings for female veterans have been mixed. The current study sought to further evaluate whether intimate relationship functioning is a motivator for mental health treatment seeking for male and female veterans and examine the impact of different types of trauma exposure on this association. METHOD: Using data from a longitudinal study, we examined whether intimate relationship functioning mediated the association between posttraumatic stress disorder (PTSD) symptom severity and mental health service use (0 = no mental health services, 1 = any mental health services) in male and female veterans (N = 1,200). We used multiple groups path analysis to examine whether intimate relationship functioning mediated the association between PTSD symptom severity and mental health service use for male and female veterans. RESULTS: For male veterans, greater PTSD symptom severity was related to poorer intimate relationship functioning, which in turn explained increased likelihood of mental health service use (R² = .18). This mediation effect was not significant for female veterans. CONCLUSIONS: Our findings suggest that targeting intimate relationship functioning in treatment for male veterans may be beneficial because difficulties in these relationships appear to be a motivating factor for treatment seeking. (PsycInfo Database Record (c) 2023 APA, all rights reserved).