Stress, when being considered as a labor illness, introduces a different element in occupational health, and opens a practices field de nominated “psychosocial risks”. What shows this insert of the “psychosocial risk” is a convergence field of several disciplines: psychology, medicine, social work, administration, etc. Insert that is associated to the devices: “health” and “work” that have made emerge some practices recently about those risks taken place starting from certain relationships between knowledge and the power that have made them possible, and the hypothesis is that those relationships are sustained by government's neoliberals rationalities.