Background: Nurses are well positioned to identify the most critical issues in patient care and to determine priorities for investigation. Involving nurses in developing research priorities may increase their engagement in research and enhance the development high-quality nursing practice. Aim: This study aimed to scope the potential topics for future cancer nursing research in Europe from the perspective of cancer nurses. Methods: It was the second phase of a three-phase mixed methods study comprising: a rapid review; a consultation with European cancer nurses; and a subsequent Delphi study incorporating the findings from the first two phases. The consultation involved 73 cancer nurses from the European Oncology Nursing Society. Findings: The analysis identified 73 research priority topics, which were developed into eight main themes. Conclusion: The study's findings show that the research priorities identified by cancer nurses are in accord with many of the topics highlighted by the European Union Commission, the World Health Organization, and cancer and nursing organisations with regard to cancer care and nursing practice.