In order to make clear any influence on the weight of various organs particularly in case of chronic diseases, Basing on the result of analysis carried out previously, data of 4402 autopsy cases of sudden death collected from 22 Medical Schools and Hospitals in China were studied. The organ weight analysed included those of the heart, lungs, spleen, liver, kidneys, brain and pancreas. The results showed that weights of the heart, lungs, spleen, liver and pancrease in males and weights of the the heart, spleen and pancreas in females were heavier than those of the non-sudden death cases in adults. The difference between male and female organ weights were that weight of the female brain aged above 3 months old and weight of all the 7 organs measured in adult female were lighter than the male.