The Personality Inventory for DSM-5 (PID-5) is an emerging measure used to map pathological personality traits. In this thesis, the reliability and facet structure of the Swedish version of the PID-5 is evaluated. Further, the possible occurrence of higher-order factors of the pathological personality traits is explored. Using a sample of 275 observations, the facet structure and higher-order factors are investigated using structural equation modeling (SEM). Results show that the internal consistency, measured with Cronbach's alpha, is strong for the facets and adequate for the domains from the PID-5. The theorized facet structure could not be confirmed for the Swedish version of the PID-5. Treating the five domains as observed variables, support for a general factor of psychopathology and indications of the two factors internalizing and externalizing are found.