This study investigates the current state of online research guides of the national archives of four countries including the UK, the USA, Australia, and Korea. It also analyzes the name and accessibility, subject coverage and categorization, number of guides completed, and structure and types of resources linked with each guide. The examined online research guides are evaluated based on accessibility, variety, systematization, consistency, and hyperlinks. Based on the analyses, it suggests the directions of designing research guides for the National Archives of Korea.