A signal transfer apparatus of a computer. The signal transfer apparatus includes a substrate installed in a main system frame of the computer, a driving device installed on the substrate, for converting a video signal into a current signal, a semiconductor laser array for emitting light corresponding to the current signal from the driving device, an optical fiber bundle for transferring the light emitted from the semiconductor laser array to a display, a photo receiver array for converting the light transferred through the optical fiber bundle into a current signal, and a converter for converting the current signal output from the photo receiver array into a video signal.