To heighten security by preventing a loss due to forgery of special prize and wrongdoing in a special prize exchange system of a game spot such as a pachinko hall or the like.

An ID card or an optical memory card are delivered in a pachinko hall through a maker 1 and a distributor 2. ID cards or optical memory cards where exchange data depending on the number of pachinko balls brought by a game player is written are issued as a special prize by an issue means 3a provided on a counter of the pachinko hall 3, and an exchange means 3b such as an automatic cash dispenser or the like similarly provided in the pachinko hall 3 pays out cash or merchandise coupons when the card where the data is written is input.