Gundam 00
- Title: Kidou Senshi Gundam Double O (Japanese)
- 機動戦士ガンダム00 <ダブルオー> (Japanese)
- Genres: Drama, Mecha, Military, Science Fiction
- Note: Mobile Suit Gundam 00 is the first Gundam series to be produced and broadcast in high-definition format as well as the first to be set in Anno Domini

It is the year A.D. 2307. Fossil fuels on Earth have been exhausted entirely, Humankind must now rely on the next available power source: solar energy. Thus for, 3 orbital elevators with solar power generation systems orbiting the Earth are built and controlled by each major powers nations on the planet : the Union of Solar Energy and Free Nations (formerly United States of America), the Human Reform League (Russia, China and India) and the Advanced European Union.
However, not everything is roses and joy as the infinite source of energy being controlled by a handful of people soon enough arise new conflicts. The world not in constant warfare for fuels and energy control, calls out the until that day unknown military organization, Celestial Being which ultimately claim the end of all wars and strife through the use of a private army made of Gundams.
Everything is now set, and the Gundam Meisters (pilots) : Setsuna F. Seiei, Lockon Stratos, Allelujah Haptism and Tiera Erde now fight to achieve their goal which might lead them all to an irrefutable cruel end.


