In a national questionnaire-based multicentre study, the use of 'alternative medicine', here called non-proven therapy (NPT), was examined. Five questions about the patients' religious beliefs and their preferences concerning pastoral services in the hospitals were included. Among the 911 invited patients, 642 (70.5%) were included in the analysis. Spiritual healing, defined as faith healing and healing by hand, was the most frequently used NPT among Norwegian cancer patients. Almost 50% of cancer patients using spiritual healing had used NPTs, mainly spiritual healing, prior to the diagnosis of cancer. Women, elderly people and patients using faith healing described themselves more often as religious. 139 (23%) of the responding patients reported a strengthening of their religious belief after the diagnosis of cancer. Patients less than 45 years of age and better educated patients expressed more frequently that all patients should be offered pastoral services during the hospital stay. Older patients, in spite of being more religious, expressed that the patients themselves had to request such services.