To allow a game parlor side to easily select a sales administrating organization, or a third part organization in a sales administration system properly grasping the sales of the game parlor.

This sales administration system determines the presence/absence of a fraud by computing/analyzing sales data in a game media dispenser 20, a game media difference data obtained from counting data in a game machine 10 and counting data from a game media counting machine 30 and the respective types of data are administered by a sales administrating organization A. This system facilitates a registration of the sales administrating organization A by just alternatively selecting it among a list of sales administrating organizations displayed on a display screen of a parlor computer 44, automatically performs encoding corresponding to the sales administrating organization A, and transmit data thereto.