PURPOSE: To exercise a fighting game with an opponent at a remote place, etc., by connecting a game device main body to a communication channel by an acoustic coupler and executing the game by the data of a read card and information received from the communication channel via the acoustic coupler.

CONSTITUTION: This card game system is constituted of the game device main bodies 1000(1)-1000(n) and a host side arithmetic processor 2000 connected via the communication channel such as a telephone line, etc., and an acoustic coupler means 100 connects the game device main body 1000 to the communication channel such the telephone line, etc. A reading means 200 reads data recorded on a magnetic card, and a write means 300 stores the data in the magnetic card. An input means 400 inputs the response of a user, and a display means 500 displays the progressive situation of the game, and an arithmetic processing means 600 executes the game by the data in the magnetic card read by the reading means 200 and the information inputted from the telephone line via the acoustic coupler means 100.