The author presents the main models to explain the relationships between mental health and work and proposes to deepen the knowledge about the mental health pole, with the application of the concept of psychism. To support this, bases himself on theoretical and methodological concepts of psychoanalysis. A case study with the application of the method was exposed. It is a study about a group of traffic operator of a big city. The study reveals emotional conflicts and their intra-psychic aspects , among them are the angst, the conflicts among id, ego and super-ego, and the psychic mechanism of the groups dynamics. In this way, the psychoanalysis gives their contributions to the understanding of these conflicts and reveal what happen in the mind of the traffic operator during their work, being able, with their theories and methods to extend these applications to the study of the relationships between mental health and work in other professional categories.