The stress is a product of inequality of the traditional leisure-consumption model in the labor market. So, this research estimates a Job Stress Index (JSI) using the fuzzy sets measurement method with the aim of identifying the stress levels faced by the employed population and its possible determinants. Once the JSI is estimated, we analyzed the profile of job stress using a probit ordered multinomial model from a set of sociodemographic and labor attributes. The results suggest the job stress is not correlated with the employment rates. Likewise, the profile of working more than 48 hours a week, being a man, without a labor contract, divorced, changing of job, among other factors are associated with a high probability of being with job stress at least 17.19%. The JSI reconciles the importance of implementing occupational health programs in order to improve the work environment, and theoretical consistency according to the suggested from the psychology, becoming a novel contribution from the economic sciences.