Validity of the axis "conflicts" of the Operationalized Psychodynamic Diagnostics (OPD) Objectives: This clinical trial is concerned with controlling the validity of unconscious conflicts within the OPD by verifying the hypotheses by means of psychometric analysis. Methods: Unconscious conflicts were determined by use of the OPD as well as by psychomet-ric tests (GT, IIP, RQ-2) for patients in treatment in a psychosomatic hospital; they were di-vided into an explorative (n = 1377) and a confirmative (n = 1380) sample. Using the Mann-Whitney U-test, we investigated the connection between the main conflicts according to OPD-1 and the psychometric findings. Results: For seven of most frequently chosen conflict types, a great coherence was found. For the others the results were inconsistent. Conclusion: Concerning the seven most frequently chosen conflict types, the OPD is a valid diagnose tool. As to the other conflicts, this study cannot clear up open questions concerning validity.