Structure Deck: Undead World is a Structure Deck in the Yu-Gi-Oh! Official Card Game (OCG). It is the fifteenth deck in the OCG's Structure Deck series (twenty-third including the Character Structure Decks), following Structure Deck: Advent of the Emperor. The TCG equivalent of this Deck is Zombie World Structure Deck.
In the Korean OCG, Structure Deck: Undead World was released on April 18, 2009 as Structure Deck: Undead World Family Edition.
The deck features Zombie-Type monsters, adapting it to the new format to build and create new Zombie-Type Decks. Beginners of the game will find this an easy to use deck to experience the joy of the Zombie-Type group. It includes a new Red-Eyes Black Dragon counterpart, "Red-Eyes Zombie Dragon". The deck features 5 cards new to the OCG on its release.
Each Structure Deck: Undead World contains:
- 1 Preconstructed Deck of 40 cards
- 1 Rulebook
- 1 Playing Guide
- 1 Playmat
ＳＴＲＵＣＴＵＲＥ ＤＥＣＫ—アンデットワールド— (Japanese)