Native Hawaiians have high incidence rates of cancers diagnosed in late stages and, thus, many might benefit from participation in cancer clinical trials. A survey was developed to explore knowledge, attitudes, and practices of Hawai'i oncologists with regard to cancer treatment clinical trials and Native Hawaiian participation in them. Findings suggest that most cancer specialists are supportive of clinical trials. However, physicians identified a number of barriers to Native Hawaiian participation in clinical trials. Ways to increase participation in clinical trials are suggested.