This article investigates what Hans Blumenberg has in mind when he characterizes his own philosophical activity as a „metaphorology”. An adequate understanding of Blumenberg's work has to consider the author's fundamental change of perspective concerning the relationship between metaphorical and conceptual language. First, metaphorology is considered as an auxiliary discipline of the „history of concepts” as it was developed in the Archiv für Begriffsgeschichte and the Historisches Wörterbuch der Philosophie . Even at this stage, however, Blumenberg already respects metaphors as (...) „basic constituents of philosophical language” which can never be recuperated adequately and completely by conceptual language. In this context, he proposes to comprehend the „truth” of a metaphor as „pragmatic”. Gradually, Blumenberg gives up the priority of the concept and announces his „theory of unconceivability” , which has its starting point in the assumption that reality transcends whatever can be predicated in a clear and distinct way. Blumenberg, however, stresses the predicability of the „mystical” with his notion of „metaphorics of break-up” . Although Blumenberg rejects every form of essentialism in his thinking of man and reality, his view on the functioning of metaphors has its foundation in some anthropological and ontological assumptions, with the central notion of man as a „being of lack who tries to overcome his unability to adapt to reality, by a rhetorical, i.e. indirect and functional relationship to reality. Blumenberg's metaphorology stands midway between pragmatics and metaphysics. It is more than pragmatics because it also implies a statement on the character of reality. It is less than metaphysics because these statements precisely bring into the open the vanity of conceptual language. Therefore, we propose to characterize Blumenberg's philosophy as a kind of „negative metaphysics”. (shrink)