Fullmetal Alchemist (Japanese: 鋼の錬金術師, Hepburn: Hagane no Renkinjutsushi) is a Japanese anime television series loosely adapted from the original manga series of the same name by Hiromu Arakawa. Comprising 51 episodes, it was produced by the animation studio Bones for Mainichi Broadcasting System and Aniplex, and directed by Seiji Mizushima. It was broadcast on MBS in Japan from October 2003 to October 2004.

As in the manga, the series follows the adventures of brothers Edward and Alphonse Elric, who are searching for the Philosopher's Stone so they can regain the bodies they lost in a failed attempt to bring their dead mother back to life. During production, Arakawa requested an original ending for the anime that differed from the manga, which was still ongoing at the time. This led to the series deviating into an entirely original storyline direction halfway through its run, though it received audience and critical acclaim. The first anime series concluded with a direct sequel film, Conqueror of Shamballa, released in 2005. A second anime series, Fullmetal Alchemist: Brotherhood, which more faithfully adapted the entire storyline of the original manga, was broadcast in 2009.