This document reviews Good Clinical Practice (GCP) guidelines. It aims to study GCP principles and their application. The document outlines the objectives, contents, and introduction to GCP. It describes 14 GCP principles regarding ethical conduct of clinical trials, including protocol development, risk identification, benefit-risk assessment, review by ethics committees, informed consent, qualifications of investigators and staff, record keeping, confidentiality, manufacturing standards, and quality systems. The document provides examples of how each principle is applied in clinical research. It concludes with a bibliography on GCP guidelines and resources.