Digimon Frontier (デジモンフロンティア, Dejimon Furontia) is the fourth series of Digimon.

News about this first came when it was officially announced by Toei in December 2001, when it was given the tentative title "Digimon Scanners" (デジモンスキャナーズ). The first images of the protagonists as well as their names, their respective Digimon evolutions and the title of the series was released in the March 2002 edition of the V-Jump.

This season aired 50 episodes which were broadcasted on Sundays at 9:00 AM - 9:30AM UTC+9 on Fuji TV, replacing Digimon Tamers (デジモンテイマーズ) commencing on April 7, 2002 and ending on March 30, 2003. Its timeslot was replaced by Konjiki no Gash Bell!! (金色のガッシュベル!!) on April 6, 2003. In the United States, episodes were aired on the United Paramount Network (UPN) commencing September 9, 2002 and ending July 14, 2003.

This was originally announced to be the last series of Digimon, however due to successes in franchise sales particularly during the release of Digital Monster X-Evolution two years later, this gave the potential to produce another possible series, which would be launched three years later.