A Certain Magical Index: The Movie – The Miracle of Endymion (Japanese: 劇場版 とある魔術の禁書目録(インデックス) エンデュミオンの奇蹟, Hepburn: Gekijōban Toaru Majutsu no Indekkusu: Endyumion no Kiseki) is a 2013 Japanese animated film based on an original story written by Kazuma Kamachi featuring the characters of his light novel series A Certain Magical Index. Produced by J.C.Staff and distributed by Warner Bros. Pictures Japan, the film is directed by Hiroshi Nishikiori from a script written by Hiroyuki Yoshino and stars Atsushi Abe, Yuka Iguchi, Rina Satō, and Sachika Misawa. In the film, Toma Kamijo and Index meet Arisa Meigo, who has a mysterious past, as magicians target her for being a threat to the balance between the world of magic and science.

An anime film for the Index franchise was announced in October 2011. In July 2012, Nishikiori and Yoshino were confirmed to be directing and writing the film, respectively, with the cast of the franchise's anime television series returning to reprise their roles. Additional cast to voice the original characters in the film were announced in October 2012. The film was completed a week before its premiere in February 2013.

A Certain Magical Index: The Movie – The Miracle of Endymion premiered in Japan on February 23, 2013, and was released in the United States on January 12, 2015. The film grossed over $4 million at the Japanese box office.