Akumaizer 3 is a Japanese science fiction tokusatsu television series, created by Shotaro Ishinomori and produced by Toei Company. The series premiered on Tuesday October 7, 1975 at 7:30, and ran for 38 episodes in that timeslot on NET, now known as TV Asahi. The series remains obscure outside of Japan, but was popular and renowned in its home country. The series was followed by a sequel called Chojin Bibyun which used rejected designs from the Kamen Rider series as its hero designs.

地底世界Down World（ダウンワールド）居住了名為惡魔族（アクマ族）的人類，當中由惡魔族及地上人類混血而生的佐比丹（ザビタン），因反對族人侵略地面而出走。

　　惡魔族因而派遣伊比路（イビル）及加貝拉（ガブラ）追殺之。但後來二人因佐比丹的真誠而改變，三人組成了伏魔三劍俠，為地面的人類與自己的一族而戰。