Dissertation looks into the various aspects of relations between Reinhart Koselleck s history of concepts and Hans-Georg Gadamer s philosophical hermeneutics. By proposing to interpret Koselleck s work in the light of inquiries made by hermeneutics philosophy, we intend to comprehend and bring into question one form of historical knowledge that is based upon the dialogue and the link between past and present, with a view to opening up new horizons and prospects of future. Such purpose is well served by Koselleck s historical studies, be it through their theoretical ties with the Heideggerian philosophy or their insertion into the political and social questions of his days, whereas they also make up a major discussion topic within our discipline. These authors strong argument on the fundamentals of historical knowledge shows not only dissent, but a wide field of consent as well, which will both be approached here. Authors ideas are of much interest just when historical science increasingly seems to state its purpose as an inquiry into historical otherness. The relation between history and philosophy may disclose interesting prospects for the discipline, which has greatly experienced the impact of anthropological trends in the latest decades.