Postmortem changes constitute the natural progression of the body's decomposition after death, beginning at the cellular level. The process involves complex cellular and biological phenomena. The changes commence immediately after death continue to occur over a prolonged period at different rates for different organs.An understanding of the postmortem changes is essential for the estimation of the postmortem interval (PMI) or time since death, one of the primary objectives of the forensic autopsy. This book gives a detailed description of postmortem changes in an easily understandable language and act as ready reference for medical students.