Considering literature studied, we concluded that, even though both tacit knowledge sharing process and organizational citizenship behaviors have positive implication on personal and professional development and also organizational performance, they are not addressed together too often. The purpose of this paper is to illustrate the way in which the organizational citizenship behavior developed in the hotels from Romania can facilitates the process of sharing tacit knowledge among the employees. In order to achieve the paper’s aim, first we investigated the presence of organizational citizenship behavior, conducting a survey based on a five point Likert questionnaire proposed by Podsakoff et al (1997), and second we explained the way in which OCBs can facilitate tacit knowledge, on 36 supervisors. All three forms of organizational citizenship behaviors present in literature – helping behavior, civic virtue and sportsmanship - were identified in all departments taken into consideration. Two of them were most present in food & beverage department, result that may be explain by the existence of a specific work environment that can influence the appearance of OCBs and by default the sharing of tacit knowledge. After a content analysis we concluded that organizational citizenship behaviors (OCBs) can facilitate tacit knowledge sharing between the hotel employees. Tacit knowledge sharing can appear when employees express their opinions about improving team’s activities (civic virtue), when they encourage and help each other and when they share similar experiences (helping behavior).