To enable a player to experience interest by performance display and interest by behaviors of game balls.

According to a game machine, in order that winning/losing lottery by a special symbol is performed, game balls are needed to be put in a center accessory 5 from an opened wing piece 5a and are needed to be sorted into a lottery pocket 105 in a middle layer part 200, so that there occurs such a pleasure that players are glad and sad by turns at behaviors of the game balls in the middle layer part 200. Also, lottery is not performed even when game balls enter a start pocket 11 unless game balls win validity winning/losing determination making the start pocket 11 valid even when the game balls enter the lottery pocket 105, so that effects of a such fraudulence practice that the game balls are forcibly put in the lottery pocket 105 can be reduced by half. Thus, since pleasure by behaviors of game balls are sure to be experienced, and performance display of winning/losing is visible at a performance symbol display device 6, the player can experience different kinds of pleasure in a well-balanced manner.