The current paper attempts to contribute to the elucidation of the tragic in the philosophies of Nietzsche and Unamuno; it is proposed that actually exists a correspondence between them that goes further than the nominal coincidence on the name "tragedy". The common factor can be found in the experience of human suffering which both recognize as being primary, and which will be understood as a contradictory tension of the aspiration of infinity and continuous overcoming that the tragic men feel against the boundaries of their individual and finite existence.