Disclosed is a portable wireless network game apparatus which comprises: a display device displaying graphics; a game program pack including a storage device which stores the game program; a function key unit generating control signals to control operations of the game program; a microprocessor loading the game program stored in the game program pack for executing the game, generating and outputting the graphics signals and audio signals of the game program, transmitting the graphics signals to the display device, receiving the control signals of the function key unit to execute the operations of the game program, and outputting control signals to transmit/receive data of the operations of the game program to/from opponents' game apparatuses; a base band wave generator generating base band carrier waves to transmit the data of the operations of the game program; a transmitter receiving the base band carrier waves and game executing data of the microprocessor, converting the base band carrier waves into carrier waves of a predetermined band, readying the game executing data on the carrier waves and modulating the same, and transmitting the modulated signals to opponents' game apparatuses; and a receiver receiving the modulated signals including the game executing data from the opponent's game apparatus, demodulating the same to the game executing data, and transmitting the game executing data to the microprocessor.