To relaxing confusion at a premium changing counter and to make inventory control of low price prizes reasonable by accelerating changing processing of the low price prizes.

The prize changing system is provided with: a game medium counting machine 10 which counts game mediums acquired by a playing customer and records the countered number of game mediums in a recording medium 13 to issue; and a prize changing device 20 which reads the number of game mediums from the recording medium 13 to carry out the prize changing processing. The prize changing device 20 is provided with a function of specifying the number of remaining game mediums which cannot be changed to special prizes among the number of game mediums read from the recording medium, and presenting the low price prizes and/or the combination of the low price prizes recommended by the game place to the playing customer from among the low price prizes which can be changed within the range of the number of the remaining game mediums.