Digimon Tamers: Battle of Adventurers (Japanese: デジモンテイマーズ 冒険者たちの戦い, Hepburn: Dejimon Teimāzu Bōkensha-tachi no Tatakai) is a 2001 Japanese animated adventure film based on the Digimon franchise created by Akiyoshi Hongo, and its third series, Digimon Tamers. The film is directed by Tetsuo Imazawa, written by Yasuko Kobayashi, and produced by Toei Animation. The film was released in Japan on July 14, 2001, as part of Toei Animation Summer 2001 Animation Fair, featuring alongside Mōtto! Ojamajo Doremi: The Secret of the Frog Stone and Kinnikuman: Second Generation films.

The film takes place during the Tamers' summer vacation, where Mephistomon sends Digimon to invade the Real World through a virus called the "V-Pet".

The film marks the first film for Digimon Tamers, and was followed by Runaway Locomon short film (2002).