[ABSTRACT] We present a study made in a sample of 156 workers, in which we evaluate the relationship between job stress measured with the Labour Stress Questionnaire (CuEL) and some bio-medical an job variables: stress reactivity, psychopathology, blood cortisol, blood lipids, blood glucose, body mass index, arterial tension, pulse, physical activity level, age, antiquity in job and salary. We conclude there are different and complex relations between the eleven CuEL factors and the variables we