The Legend of the Legendary Heroes (Japanese: 伝説の勇者の伝説, Hepburn: Densetsu no Yūsha no Densetsu) is a Japanese light novel series by Takaya Kagami, with illustrations by Saori Toyota, which was published by Fujimi Shobo in Dragon Magazine from February 20, 2002 to October 20, 2006, and has 11 volumes. Its sequel, The Legend of the Great Legendary Heroes (大伝説の勇者の伝説, Dai Densetsu no Yūsha no Densetsu) began publishing on October 20, 2007, and has been collected into 18 volumes. The series also has 2 spin-off series, The Legend of Legendary Heroes Anyway (とりあえず伝説の勇者の伝説, Toriaezu Densetsu no Yūsha no Densetsu), a collection of short stories which ran from December 20, 2002 to June 20, 2007 and was compiled into 11 volumes, and The Legend of the Black Fallen Hero (堕ちた黒い勇者の伝説, Ochita Kuroi Yūsha no Densetsu), which ran from December 20, 2007 to August 20, 2013 and was published in 8 volumes.

The series has also spun off into other media including a Drama CD, a manga adaptation which is collected into 9 bound volumes and a PSP video game which was released on February 18, 2010. A 24-episode anime adaptation was produced by Zexcs which premiered on July 1, 2010 and is licensed by Kadokawa in Japan and Funimation Entertainment in North America.