The present thesis deals with the comparison of the novel and the film The Cider House Rules. In the first part of the thesis, John Irvings life as well as work is discussed in order to give an insight into his various novels and re-occurring themes the reader comes across. Additionally, an insight into the process of writing the novel is given. Then, the historical as well as socio-cultural context of the novel is discussed; this chapter further contains information on adoption and abortion in the United States during the 20th century. Before moving on to a detailed description of the film and its director, a summary of the novel as well as an analysis of the major and minor characters is given. After depicting the visual and acoustic effects of the movie, a description of the basic aspects of screen adaptation is presented. Furthermore, this thesis contains a comparison of the novel and the film which is based on four research questions dealing with the relationship between Dr. Larch and Homer, the representation of adoption and abortion in novel and film, the major differences between these mediums and the consequences of these changes.