This study reports on oncology professionals’ knowledge and attitude toward CAM, classified according to their primary application as complementary or alternative methods. A national, multicentre survey of 828 Norwegian oncologists, nurses, clerks and therapeutic radiographers was conducted. A response rate of 61% was achieved. Only a few physicians (4%) described their reactions to alternative medicine as positive compared with nurses (33%), therapeutic radiographers (32%) and clerks (55%). Females showed a more positive view than males. More participants expressed a positive attitude to complementary vs. alternative medicines. Most respondents regarded healing by hand or prayer, homoeopathy and Iscador (Viscum album) as alternative therapies. In contrast, most respondents classified acupuncture, meditation, reflexology, music/art-therapy, aromatherapy and massage as CT.