The aims of this article are to present the historical moment in which an opportunity for psychological research and practices emerges in the field of workers' health in the context of Public Health, and to register experiences that exemplify different insertions of Psychology in workers' health. It focuses the description on the State of São Paulo in the middle of 1980's: the political and institutional context which is favorable to the development of that field. It presents some psychological activities in public health services that highlight the contributions of Psychology to the field of worker's health.
workers' health; public health; health psychology; social psychology; history of psychology