en روانشناسی Psychology پژوهشي Research <div style="text-align: justify;"><strong>Background and Objective</strong>: The global increase in the prevalence of psychosomatic disorders has made them a major public health problem, highlighting the importance of addressing them and the underlying factors of psychosomatic disorders. Therefore, this study aimed to investigate the mediating role of self-critical rumination in the relationship between childhood trauma and symptoms of psychosomatic disorders.<br> <strong>Materials & Methods</strong>: This was a descriptive correlational study. The statistical population included all adults over 18 years of age, from whom 300 people were selected using convenience sampling. The childhood trauma questionnaires, Symptoms of Psychosomatic Disorders of and Self-Critical Rumination were used to conduct the research.<br> <strong>Results</strong>: The data were analyzed using Pearson correlation test and Path analysis. The results showed that childhood trauma had a positive and significant indirect effect on symptoms of psychosomatic disorders through self-critical rumination, and childhood trauma had a positive direct effect on self-critical rumination and symptoms of psychosomatic disorders.<br> <strong>Conclusion</strong>: Childhood trauma and the experience of its various types in individuals make them susceptible to self-critical rumination, and self-critical rumination is a precursor to psychological and physical problems, including psychosomatic disorders.<br> &nbsp;</div> Adverse childhood experiences, Self-critical rumination, Somatic symptom distress 41 52 http://cpr.mazums.ac.ir/browse.php?a_code=A-10-270-1&slc_lang=en&sid=1 Fatemeh Alidoosti f.alidoosti@khayyam.ac.ir 10031947532846002741 10031947532846002741 Yes Department of Psychology, Faculty of Humanities, Khayyam University, Mashhad, Iran. Mohadeseh Yazdani mohadeseyzdn5@gmail.com 10031947532846002742 0009-0002-0473-3335 No Department of Psychology, Faculty of Humanities, Khayyam University, Mashhad, Iran.