This study examined the effect of the big-five personality dimensions on adolescents’ entrepreneurial behaviour. One hundred and fifty (150) adolescents were randomly selected and participated in the study. Data were collected using two instruments with already established psychometric properties. These
instruments are Robinson et al. (1991)’s Entrepreneurial Attitudes Orientation Survey, and (ii) John and Srivastava (1999)’s Big Five Inventory (BFI). Multiple regression analysis (stepwise) statistical method was used to test the two hypotheses formulated for the study at .05 level of significance. The outcome of the analysis revealed that 33.1% of the total variance in adolescents’ entrepreneurial behaviour was accounted for by the predictor variables. The most potent factors to the prediction of entrepreneurial behaviour among the participants were conscientiousness and openness to experience personality type. Based on the findings of this study, counselling implications were discussed and recommendations were made.