Qualitative research under the analysis of contents, thematic modality, aimed to identify the difficulties lived by the matricial supporter in its practice in the Primary Health Care. The scenery of the study were six units of family health located in one of the five Sanitary Districts of João Pessoa-PB. The data collection was performed from August to September 2010, through semi directed interviews, in which ten professionals who worked as matricial supporters participated. According to the speeches the difficulties faced relate to the ignorance of some professionals of the health team toward the function of the matricial supporter in the Basic Health Attention; lack of autonomy and administrative overload. In this sense, it is suggested that a process of reflection about the work of the matricial supporter with the health team aiming to acknowledge which contribution of this professional in the reorganization of the work of the team of basic attention.