The contribution of community health agents (CHAs) is strategic for overcoming the biomedical health model. However, weaknesses in defining the specific roles of this profession impose contradictions and impediments to this work, making it difficult to construct the professional world of CHAs. Thus, this study aimed to analyze the tasks performed by the CHAs to reveal the objects, values, and tools, used by these workers to help consolidate their professional world. This study is a qualitative research study guided by the principles of activity ergonomics that include documentary analysis, systematic observations, and interviews. The results showed that due to the myriad of activities performed by the CHAs, the professional world of these workers is not fully delineated. However, it is believed that the results, analysis, and discussion of the data verified in this research, can support the consolidation of the professional world of the CHAs.