Background: Pre-anaesthesia assessment is crucial to ensure the quality and safety of anaesthesia and surgery. However, despite being very common and essential for many patients undergoing elective surgery, little is known about the different pre-anaesthesia assessment approaches. Hence, this article outlines a study protocol for a scoping review aiming to, systematically, map the literature on pre-anaesthetic assessment approaches and outcomes, synthesise existing evidence, and identify knowledge gaps for future research. Methods: We will conduct a scoping review of all study designs following the Preferred Reporting Items for Systematic and Meta-Analyses (PRISMA) statement. Moreover, the five steps set forth by Arksey and O'Malley and refined by Levac will guide the review process. Studies with adults (≥18 years) scheduled for elective surgery are included. Data regarding trial characteristics, patients, clinicians performing the pre-anaesthetic assessment, interventions and outcomes are included using a combination of Covidence and Excel. Quantitative data are summarised using descriptive statistics, and qualitative data are presented through a descriptive synthesis. Conclusion: The outlined scoping review will provide a synthesis of the literature, which can support the development of new evidence-based practices for safe perioperative management of adult patients undergoing elective surgery.