The purpose of the present work is to perform a comparative analysis between the models of psychosocial risk assessment of the demand-control-social-support side of Karasek and Tehorel and Siegrist's reward-effort, since, the year 2000. The models considered for the comparison is: Copenhagen of the year 2000 is TAS21 of 2005 the Toolkit for the evaluation of psychosocial risk factors of the Ministry of Social Protection of Colombia in 2010 and the model of evaluation of psychosocial risk factors determined by factors internal, individual, double and external presence of Bucci and Luna of the year 2013. The factors considered for the comparison are the internal of the individual and external organization of the worker.