A construção da Saúde do Trabalhador (ST) no Sistema Único de Saúde (SUS) representa uma conquista da classe trabalhadora ao longo de décadas. O processo de desenvolvimento desse campo no contexto brasileiro das relações produção/trabalho, ambiente e saúde é abordado neste artigo no âmbito da Atenção Básica. Objetivo: Refletir acerca das interfaces da ST na Atenção Básica do sistema de saúde brasileiro. Método: Revisão de documentos oficiais e publicações na área, organizados em duas categorias de análise: panorama histórico da ST e da ST na Atenção Básica. Resultados: As categorias de análise possibilitaram estabelecer o resgate histórico da ST no SUS e refletir acerca de elementos AbstractThe 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.