The authors studied on a way to use the fixed cells for the determination of the blood group from decomposed corpse. A summary of the results was as follows. 1. At the determination of the blood group from fearlly decomposed blood, meconium and organs, various tyoes of red ced cells such as A, B and O which were prepared to absorption test, were fixed with 1% glutaraldehyde and blood grouping was determined, blood grouping was clearlu determined without hemolysis. 2. Using the fixed red cells, agglutinative titer was decreased and blood was not agglutinated on a hole glass, but clear agglutinative reaction was occurred by use of microtechnique…