The introduction of worker's health in the Brazilian National Health System (SUS) represents decades of working class conquest. The development process of the worker's health field in the Brazilian production/labor, environment and health relations context is addressed within the primary care setting. OBJECTIVE: to reflect on the occupational health interfaces of the Brazilian primary health system. METHOD: review of official documents and publications related to the area, both organized into two categories of analysis: worker's health historical overview and worker's health within primary care. RESULTS: Through these categories of analysis it was possible to produce an historical revival of worker's health in SUS and reflect on elements of worker's health in primary care, such as: territory and health care tools; primary care teams competence, worker's health surveillance; production and environmental health relations; educational practices in worker's health; health worker's vulnerabilities and institutional experiences. CONCLUSION: worker's health incorporation in primary care is characterized by an element to reset and change practices in the healthcare model.
worker's health; primary health care; territorial basis organization; environmental health; worker's health surveillance