A total of 272 lots of immunoglobulin products was investigated, and the anti- body potency of measles was determined by hemogglutination inhibition test. The total antibody potencies of diphtheria, pertusis, rubella, epidemic hemorrhagic lever and titer of anti-HBs and anti-HAY were tested in some lots of immunoglobulin produced in recent years. The results provided a scien- tific basis for clinical use.