The constitutive role of technology in the constructive theory of science. Consequences for the philosophy of technology. Technology plays an important role in the constructivistic reconstructions of the natural sciences. However, there is no indepth view or thorough explication of the term "technology" and its connotations and relations in those exercises. Technology, there, is seen as a more or less evident part of the lifeworld's A priori of the natural sciences. This paper is dedicated to the reconstruction of the function (...) of technology in the argumentations chains and proto-theories which shall, in the constructivistic (methodical) theory of sciences, provide the methodical fundament of the sciences. In a second step, the aspects of technology are identified which are indispensable to fulfil the functions of technology in the argumentation chains mentioned above. Finally, these aspects are related to current debates in the philosophy of technology. (shrink)