|This article is about a/an monster in Battle Fever J.|
The Blue Vein Monster (青スジ怪人) is the seventeenth of Egos' Monsters. He could disguise himself as a human and had a broadsword. Blue Vein Robot also had a broadsword and could use explosive flashes from his forehead.
- Blue Vein Monster were designed by character designer Muneo Kubo.