ABSTRACT The study is aimed at examining how the big-five personality traits influence Organizational Citizenship Behaviour. This emanated from the series of speculations as to whether or not Organizational Citizenship Behaviour are been influence by individuals personality in Nigeria. The number of participants used for this study were 100 consisting of 66 males and 34 females. Using the big five inventory (BFI) and the organizational citizenship behavior scale, five hypotheses (there would ...