Disclosed is a game item transaction system comprising: a user terminal for executing game item wallet software for management of game items possessed by a game user, and generating transaction information of a game item possessed by the game user and broadcasting the same over a network; a game server for managing the progress of a game and storing game user IDs, which are identification information of users of the game, and information on game items possessed by the users according to the game user IDs; and a financial server for storing financial account information of game item transaction parties.