The big breakthrough proposed by the 5th edition of Diagnostic and Statistical Manual of Mental Disorders is the introduction of assessment of the level of personality functioning regarding to the two dimensions Self and Interpersonal functioning. One of questionnaires constructed to measure impairment of personality functioning, The Severity Indices of Personality Problems has been used on several clinical samples where the result was a different factor structure while there was only one research conducted on adolescent population. The aim of this research is the evaluation of construct validity of SIPP-118 translation for the Croatian adolescent sample. The research was conducted on 498 students of a high school and vocational schools located in Osijek, Beli Manastir, Đakovo and Donji Miholjac. Previously proposed SIPP-118 models with four or five core elements of personality functioning had been tested by confirmatory factor analysis which yielded a poor goodness of fit. The next step in the process was the implementation of the exploratory factor analysis for which results suggest that the SIPP-118 scales group into two higher-order scales Self and Interpersonal dimension. Except the possibility of calculating the results for the two main dimensions, it is possible to calculate the results for each of the 16 facets. Overall, the SIPP-118 seems to be a potentially good measurement instrument of core elements of personality functioning which could be successfully conducted on adolescent population, but its efficiency is still to be confirmed in the clinical population.