Introduction: advance care planning (ACP) facilitates patients’ preferences for future treatment. It has been associated with improved quality of end-of-life care. While several factors contribute to ACP implementation, little is known about the specific components involved. This scoping review aimed to identify and explore components of ACP, including knowledge, attitudes, values and beliefs, cultural and ethnic factors in patients with cancer and their families. Methods: The scoping review followed the updated Preferred Reporting Items for Systematic Reviews and Meta-Analysis Scoping Review (PRISMA-ScR) 2020 checklist. A search was conducted in the PubMed, Scopus, and Science Direct databases until December 2023, and the selected articles were assessed using the Joanna Briggs Critical Appraisal Tool (MMAT). Results: This scoping review included 42 studies. The included studies were grouped by design: quantitative (n=12), qualitative (n=15), and mixed methods (n=15). Key ACP components identified included knowledge and perceptions (n=28), attitudes and behaviours (n=33), values and beliefs (n=26), and cultural and ethnic aspects (n=13). Conclusion: This review provides a summary of the crucial components including knowledge and perception, attitudes and behaviors, values and beliefs, and cultural and ethnic perspectives to consider when implementing ACP for patients with cancer.