Exploratory study of qualitative and quantitative nature that evaluates the performance of the health services in providing DOT in households of a big city in Brazil. For the quantitative analysis, indexes were created to evaluate the optimization of material/human resources and the observation of the medicine ingestion. It was observed that performance of services is influenced by the availability of human/material resources, the internal organization of services and the absence of the ill person in the household. For the qualitative analysis it was used the content analysis, thematic modality. The main factors influencing the performance of the health service were found to be its insufficiency of material and human resources and the ill person's social-cultural and economic context. Concluding, it is necessary permanent managerial, organizational and techno-assistance qualification of the health professionals in the TB control.