This basic course provides an introduction into the responsibilities of clinical investigators according to Good Clinical Practice and the implementation of GCP into daily routine. This four-hour class is intended for all clinical trial staff looking for a tight overview of the legal framework of clinical trials and the requirements according to GCP. For potential investigators without experience in the conduct of clinical trials we recommend their participation in a two-day training course for investigators. Participating in the basic course is not considered sufficient for approval by ethics committees.