The objective of this dissertation is the study of mourning within Lacan works. With this, it will be developed some aspects of mourning within Lacan teaching. Lacan approaches mourning in the perspective of the act, the inhibited act. Thus, it is possible to take Hamlet as an example, a character that finds himself bound to a tough and problematic connection with his act because of his desire. He fails in fulfilling the mission assigned to him, Hamlet can act only when he lives the mourning and pulls his desire back. The dissertation unfolds from the freudian formulation based on which the loss demands mourning and this mourning can only be lived naturally, with time, without any intervention; this would be the normal mourning. Otherwise, the mourning unleashed can t reach its spontaneous end, and remains blocked. Within this circumstance, mourning will turn into pathological mourning. Lacan demonstrates that the individual in mourning is in a problematic position in relation to the desire of the Other, thus, the difficulty of the mourning is connected to the loss of the possibility of knowing what the object meant to the Other s desire. Lacan believes that what is implied in the mourning is the maintenance of the bonds through where desire is suspended. To reach desire, there is a time of anguish, and said anguish is the anguish of castration. The greater the anguish, the greater is the inhibition, and less mourning. The direction of the psychoanalytical treatment of the individual in mourning would be to transform the pathological mourning into normal mourning, transform inhibition in desire.