The authors reported the results of field survey on acatalasemia and hypocatalasemia during the year of 1972 and 1973. Seventeen hypocatalasemias were seen in the test of 7,475 individuals at Oahu Is. of Hawaii, U.S.A. Among them two Englishmen, one Portugese and three Filipinos were included. One new acatalasemia case was reported in 1972. Consequently, the total of reported acatalasemias were 97 cases of 47 families by the end of 1973.