A scoping review will be completed to identify existing studies using instruments designed to measure maternal care quality and to summarize the key constructs and psychometric properties of existing instruments. The primary research questions include: (1) how has maternal care quality been conceptualized and measured? (2) what is the psychometric quality of instruments measuring maternal care quality? The review will follow the Joanna Briggs Institute's guidelines for scoping review based on Arksey and O'Malley (2005). A scoping review was selected as the design for this review because this approach is well-suited for mapping fundamental concepts and identifying gaps in the literature by systematically examining, selecting, and integrating heterogeneous research studies.