The contribution of positive orientation to organisational behavior has been assessed in three studies. Positive orientation has been conceptualised as a basic disposition to view life and experience from a positive outlook and operationalised as the common latent factor at the core of self-esteem, life satisfaction, and optimism. In Study 1 (n= 203), positive orientation predicted in-role job performance over the effects of its lower-order components (self-esteem, optimism, and life satisfaction), the Big Five, and positive affectivity. In Study 2 (n= 372), positive orientation predicted extra-role performance (Organisational Citizenship Behaviors), beyond the effects due to its lower-order components, the Big Five, and positive affectivity. In Study 3 (n= 311), a brief self-reported measure of positive orientation predicted in-role job performance above Core Self-Evaluations and the conscientiousness trait. The contribution of positive orientation to a better understanding of organisational behavior is discussed.