The aim of this study was to elucidate undergraduate university students' views on clinical xenotransplantation. A total of 1875 students from eight faculties at Uppsala University and the Swedish University of Agricultural Sciences answered a questionnaire. Three out of four respondents would be prepared to receive a transplant from an animal on medical grounds if necessary. Forty percent had signed an organ donation card. There was no difference in attitude between those who had signed an allotransplantion card and those who had not. According to gender, age, length of university program, and faculty, results showed that a higher proportion of those who approved were male, young, and studying on programs longer than three years; also, they were more likely to study programs in the Faculties of Agriculture and Pharmacy. At the Medical Faculty, nursing students seemed to be less approving, compared to future biomedical analysts, biomedical scientists, and physicians. The acceptance of xenotransplantation also tended to be positively associated with morally accepting and understanding the use of animals in biomedical research, the approval of euthanasia, the approval of early abortion, and the use of human fetuses in research, as well as clinical testing of humans.