PURPOSE: To enable players to enjoy the game with an awareness of participation, by providing a variable display part in which a lottery named AMIDA (uncrossed type Japanese lottery) is started by a pachinko ball put in a start-up winning part, and a control means for changing the easiness of winning of a special variable winning part according to the condition of a hit determined by a hit determining means.

CONSTITUTION: The pachinko unit 1 has, at various places of the game part, normal winning parts 220, variable winning parts 221, a start-up winning part 222, and a special variable winning part 223, each having a winning hole. In addition, at the center of a game board 2, a variable display part 21 made up of a liquid crystal display board is installed, and on the display screen thereof, one of a plural kinds of AMIDA lottery prepared in advance is started to be displayed by a ball put in the start-up winning part 222. That is, in the variable display part 21, first several vertical lines composing the AMIDA lottery are displayed, and then in addition to these lines, horizontal lines are displayed at random positions one by one from the left side.