The main purpose of this study was to evaluate personality dimensions, proposed by Big Five model, in our culture, by the use of the questionnaire FIBI, developed on the basis of the psycho lexical study of personality descriptions in Serbian language (Smederevac, 2000). There were 627 subjects in the study (407 females and 220 males), aged 17 to 77, and the inventory UKL7 (Smederevac, 2000) and the Big Five Inventory (BFI; John, Donahue, Kentle, 1991; John, Srivastava, 1999) were applied. The FIBI inventory was created from UKL7 by exclusion of evaluative items, items of probable artificial factor Emotional control and items with poor psychometric properties were excluded. Final solution with 69 items demonstrated solid psychometric properties. The construct validity of the FIBI has been assessed by examination of its relationship to the Big Five Inventory and results showed that scales Conventionality and Extraversion in those two inventories differ in content. Subscale Conventionality in FIBI was highly related to subscale Consciousness in BFI and showed no significant correlation to Openness to Experience of the BFI. The content of the FIBI's Extraversion scale includes positive self-evaluation, assertiveness and activity. Indicators of sociability, usually considered as dominant (or at least very important) markers of extraverted behavior, were omitted from the FIBI Extraversion scale. These content differences justify application of the emic approach in the personality psychology research. Although there are some other available instruments based on Big Five, FIBI represents product of our cultural background and seems to be worth of further examination and improvement.