The reading rooms dedicated for the Diet members are situated in the Tokyo Main Library and the Diet Branch Library inside the Diet Building, as well as the Diet Members' Study Room, which is attached to the Diet Members' Reading Room in the Main Library.
東京本館と国会議事堂内の国会分館には国会議員専用の議員閲覧室があり、本館議員閲覧室には議員研究室も付設されている。