Castlevania: The Adventure (ドラキュラ伝説 Dracula Densetsu?, "The Legend of Dracula") is an action-adventure platformer video game, part of the Castlevania series, for the Nintendo Game Boy handheld system. It was the first entry in the series released on a handheld system. The game is known in Japan as Dracula Densetsu, which translates to English as The Legend of Dracula. It was released in Japan on October 27, 1989, and in North America on December, 1989. It was released in Europe and other PAL regions in 1990.

In 1997, the game was re-released for the classic Game Boy as part of Konami GB Collection, Vol. 1. The compilation featured Super Game Boy utilization and a picture frame. The collection was released in 2000 on the Game Boy Color in Europe, with new color schemes added to each stage of the game. It also became available for download on special flash RAM cartridge through the Nintendo Power service in Japan.

The original version of Castlevania: The Adventure became available on the 3DS Virtual Console in 2012 in Japan, Europe and North America. A remake of the game belonging to the ReBirth series by Konami was later released via WiiWare in 2009.