Organizational health is a crucial theme in health psychology, however few instruments evaluate this concept. This research seeks to overcome this gap through the validation, to the portuguese population, of the Escala de Perceção de Saúde Organizacional (EPSaO). This instrument was applied to 437 subjects. The identification of the factorial structure respected the procedures of the authors. The adjustment of the factorial structure relied on the confirmatory factorial analysis of three models. The first, reference model, had two first order factors correlated, the second, a second order factor and, the third, a one-dimensional structure. The confirmatory factorial analysis was realized by the program EQS V6.1. The results suggest the maintenance of the original factorial structure. Notwithstanding, weve proceeded to a re-specification of the models, through the adequacy of the parameter estimates, which conducted to a better adjustment of them. The scale and respective subscales revealed values of the weighted-omega reliability coefficient above 0,70.