The present thesis aims at examining the impacts of Internet diffusion on the clinical psychology fields and, particularly on the psychotherapy practice in use presently. Firstly, a theoretical discussion is done. It is about the current changes in the contemporaneous context of scientific production, considering the recent development of digital technologies and, especially Internet. Secondly, the discussion focuses specifically on the clinical psychology context, on the recent interest of this area for the studies of the Internet subjective impacts and, on the exam of the corresponding production. Due to the fact that such production is almost exclusively composed of empirical research and does not consider the effects of Internet on the clinical practice, the practical focus of the present thesis aimed at investigating the gap above. In other words, a qualitative research with 16 psychotherapists has been done to know what they have to say about the Internet arrival into their offices. The main results obtained can be divided into two groups. The first one refers to clinical indicators according to the interviewed therapists perspective. They expose subjective impacts suffered by the patientsusers of the Net. Those are: the pleasure in using Internet, the sensation of omnipotence they experience, the new ways of relationship with their own bodies, the new ways of excess they are exposed to and, the new ways of control done by means of the registers set available by the Net. Nevertheless, the second group of results refers to the impacts of the Net on therapists themselves, that is, their reaction to the Internet presence in their offices and to the disturbance they felt facing the new clinical issues set in scene by their patients on-line adventures.