This study investigated the association between religious beliefs and opinions on xenotransplantation among students from three different countries. A lower proportion of religious students accepted xenotransplantation than did non-religious students. A higher proportion of Protestant students seemed to accept xenotransplantation than did Muslim and Roman Catholic students. A higher proportion of the religious respondents had not formed an opinion on xenotransplantation compared to non-religious students. There was no difference according to gender on views on xenotransplantation, but a higher proportion of older students seemed to accept xenotransplantation than did younger students. A higher proportion of non-vegetarians reported acceptance of xenotransplantation than did vegetarians. Acceptance of xenotransplantation was higher in Sweden compared to the two other regions, and the proportion of students who had formed an opinion was higher as well.