Ichiban Ushiro no Dai Maō (Japanese: いちばんうしろの大魔王, "The Great Demon King in the Back Row"), also known as Demon King Daimao, is a Japanese light novel series written by Shōtarō Mizuki and illustrated by Souichi Itō, published by Hobby Japan under their HJ Bunko imprint.

This story of "love, magic, and battles" revolves around Akuto Sai, a boy who aims to become part of his country's highest order of magicians and contribute to society as one of its clergy.

On the day he's admitted into the Constant Magical Academy, his aptitude test predicts the following: "Future Occupation: Demon King."

Six DVD and Blu-ray Disc volumes were released by Marvelous Entertainment between June 25 and November 25, 2010, each containing an original video animation called Another Great Demon King's Omake (もひとつおまけの大魔王, Mo Hitosu Omake no Dai Maō).

[42][43] The series also became part of Anime Network's Video On Demand service starting October 21, 2010.