Mega Monster Battle: Ultra Galaxy Legend (大怪獣バトル ウルトラ銀河伝説 The Movie, Daikaijū Batoru Urutora Ginga Densetsu Za Mūbī, lit. Mega Monster Battle: Ultra Galaxy Legends The Movie) is a 2009 Japanese superhero film in the Ultra Series. The film released in theaters on December 12, 2009, by Warner Bros. Entertainment Japan. The catchphrase for the movie is "Recover the light of the galaxy!!" (取り戻せ!!銀河の光, Torimodose!! Ginga no hikari). The film is also referred to as Large Monster: The Ultra Milky Way Legend. The film went on to gross $6,161,665 and become the second highest grossing Ultraman movie behind the previous year's entry. It is the first film directed by Koichi Sakamoto, marking the debut of Ultraman Zero and Ultraman Belial.

The film itself was preceded by Ultraman Mebius Side Story: Ghost Reverse, a direct-to-video special from Ultraman Mebius which lead to the movie's plot, and followed by a sequel Ultraman Zero: The Revenge of Belial in 2010.

Mega Monster Battle: Ultra Galaxy also marks Takeshi Aono's final role prior to his retirement and his death in 2012.