A game machine can detect the reasons of restart and switch the maintenance level of player information based on the reasons. The game machine has first and second control units respectively controlling the execution of a game program and continuing incrementing a count value in a progressing process of the game program; first and second nonvolatile memory areas storing the count value incremented by the second control unit as a life count and a count value acquired by the first control unit based on the life count as a copy count, respectively, wherein the life count stored in the first nonvolatile memory area and the copy count stored in the second nonvolatile memory area are compared at restart, and judgment is made that the power is shut OFF due to an irregular action of a player before the restart if the life count and the copy count are not in a predetermined relationship.