1. Game program for changing representation on a display connected with a computer on the basis of predetermined program, through which a player can execute a game; comprising: said game program being program for getting said computer to execute the following procedures; procedure for determining item price, for respectively computing prices for transfer of a plurality of items to be used in said game every each item; procedure for executing said procedure for determining item price when executing a step where possession state of said item to be used in said game is likely to be changed in said game program, and; procedure for rewriting individual data, for rewriting and changing said individual data concerning said each item when changing said possession state of said item; said procedure for determining item price having a procedure for computing price for transfer of said item on the basis of said individual data concerning each item and for displaying said price computed on said display.