PURPOSE: To provide a controller device for TV game which permits a plurality of players to use a one-man TV game device with keys from their respective controllers.

CONSTITUTION: Switch elements of a dip switch 11 furnished on an adapter 2 are set in correspondence to respective keys of two wireless controllers 1A, 1B, and the user turns on and off the switches to set in advance with which controller 1A, 1B each key should be operated. The adapter 2 receives each of these key depress information pieces, while a CPU 9 synthesizes the inputs to the two controllers 1A, 1B in accordance with the set key allocation and emits the result from the output interface 10 to the body 3 of the game machine.