. . . "FIGS. 20A to 20C show a disc cartridge according to a tenth embodiment of the present invention, wherein FIG. 20A is a perspective view showing a state where both first and second shutters are closed, FIG. 20B is a perspective view showing a state where the first shutter is open and the second shutter is closed, and FIG. 20C is a perspective view showing a state where both first and second shutter" .