International Personality Item Pool (IPIP) is a project aiming to develop measures of individual differencesas part of the public domain. This project emerged as an alternative to personality assessment instruments, whichare protected by copyright. IPIP-50 is an instrument developed through the IPIP project, which measures the fivedimensions of personality: Openness, Extraversion, Emotional Stability, Conscientiousness and Agreeableness.The aim of the present study is to test the validity of IPIP-50 on a Romanian sample of students. The factor analysis revealed that the model with five correlated factors is the best suited to describe the structure of IPIP-50. Theconvergent validity was assessed through the correlations between IPIP-50, DECAS (Sava, 2008) and NEO-FFI(Costa & McCrae, 1992/2008); except for Agreeability, all the other factors registered high correlations (rangingfrom .73 to .84). The predictive validity of IPIP-50 was assessed through its correlations with behavioral indicators identified in the literature as being relevant to the five dimensions. Using the Marlowe-Crown Social Desirability scale, we developed a social desirability indicator composed of 10 IPIP-50 items. The results reported inthis study suggest that IPIP-50 can be used successfully in research on Romanian samples, being an authenticsupport for the psychological community in Romania.