this research, aimed at studying the relationship between narcissistic personality characteristics and burnout, tests a central hypothesis that narcissistic personality traits are a burnout facilitating factor. following a correlacional design, the maslach burnout inventory and the crochick’s scale of narcissistic personality factors were given to a sample of 68 workers of two multinational advertising agencies. results were compatible, at least partially, with the proposed hypothesis. when narcissism levels were low or average the relationship between narcissism and burnout followed what was predicted by the model: higher narcissistic personality characteristics led to higher scores in the different burnout factors, particularly exhaustion. when narcissism levels were high, the relationship seemed to follow a contingent relationship with professional efficiency. if the subject felt professionally successful, narcissism worked as a protective variable against burnout and job stress. if feelings of professional failure were predominant the highly narcissistic subject developed high levels of burnout. however, the overall explanatory power of the narcissist personality factor was lower than organisational factors.