This Masters thesis deals with the narrative construction of the adolescent protagonists identity development in the adolescence novel "Die Mitte der Welt" by Andreas Steinhöfel. In doing so, the following questions are addressed: How is Phils search for identity constructed narratively? To what degree does Phils infantile sexual development influence his search for sexual identity in adolescence? Which partial identities are predominant concerning Phils sense of identity? Which narrative methods does the adolescent employ for his identity negotiation? And is it even possible to succeed in identity construction in the light of postmodernism? In order to examine these questions in detail, I draw upon an interdisciplinary approach that combines psychoanalysis (Sigmund Freud, Anna Freud, Blos, Morgenthaler), developmental psychology (Remschmidt, Flammer and Alsaker), modern (Erikson, Marcia) and postmodern identity theories (Keupp, Kraus). According to Blos, the complex processes of adolescence are closely interwoven with early sexual development, which is why Phils infantile sexual development and its influence on the phase of adolescence are examined by drawing on psychoanalytical approaches. Next, the focus is shifted to the protagonists ?self-development?, which is analysed by taking Eriksons and Marcias identity theories into consideration. Here, I examine the extent to which the adolescent dwells in the state of ?identity diffusion? since he is confronted with states of diffuse emotions several times. In accordance with Keupp, who defines identity as ?patchwork-identity?, social, national and physical partial identities are explored with respect to their narrative realizations. Finally, postmodern theories are explored in relation to Krauss concept of ?narrative self?, which is employed to examine the narrative strategies the adolescent protagonist utilizes in order to create identity for himself.