This research examines the participation of jurors in the jury. Whether in the legal research field empirical research is neglected, in the social sciences the studies disregard the practical aspect of court staff s work, emphasizing the trial sessions. This text, therefore, is mainly concerned in understanding how the jury is socially constructed, through the people s ordinary actions. The fieldwork consisted of participant observation in the jury of Juiz de Fora / MG and interviews with jurors. Through the analysis of the organization of court staff s daily work, it is clear that jurors role in these routines is secondary, both the tasks performed, and the way they express themselves throughout jury s procedures. These routines - among which are included mechanisms for selecting jurors and voting the items - are built to make the institution work. However, as people are not interested in participating, court staff must make efforts to select jurors, trying to make the jury actually happen. In this scenario, there are experienced jurors, who have a predilection of the judge because they place themselves at the disposal of the court. Nonetheless, they have little to do with popular participation in justice, as they use strategies of legitimation and identity formation, like creating a jurors association.