A frisbee includes an annular main disk, and an annular support member mounted on the main disk. Thus, the support member can be detached from the main disk, so that the frisbee is foldable when not in use, thereby facilitating storage, package and transportation of the frisbee. In addition, the frisbee is guided by the cord to fly along a circumferential orbit, so that the frisbee can be played by a single player. Further, the frisbee can be played by two players and can also be played by a single player, thereby enhancing the versatility of the frisbee.