In a gaming machine including a symbol region where reels having symbols are arranged in predetermined arrangement. The symbols are displayed in an arranged manner in longitudinal and transverse directions. A reel control unit that independently controls movement of the reels. A winning determination unit determines whether the symbols appearing on a valid line set to span the reels form a predetermined winning pattern. The symbol region includes layer. At least one reel is disposed in each layer. A symbol group is provided in at least one reel or in a specific layer in such a manner that symbols capable of forming at least portion of the winning pattern are arranged in the symbol group.