The measures that have been taken before acoustic tumor surgery for a member of the Jehovah's Witness faith are reported. In this case, fortunately, no transfusion of blood was required. At the present time, the situation regarding the treatment of the members of this faith in Japan is different from that in the United States, and there is no other choice than for each institution to set its own basic policies. However, surgery that will definitely require transfusion will not be able to be performed unless some legislation equivalent to the American system permitting life-saving treatment is established in Japan.