A virtual image display system includes a display device outputting image light, a circuit substrate driving the display device based on an image signal, a signal line connected to the circuit substrate and inputting the external image signal to the circuit substrate, a projection optical device projecting the image light from the display device, a light guide plate taking in the projected image light, and then, guiding the light to an external predetermined position, a housing member having a housing space housing respective members, and a first space communicated with the housing space and housing a part of the signal line inside, and a temple rotatably attached to the housing member via a hinge mechanism and having a second space communicated with the first space via the hinge mechanism inside. The signal line is routed from the first space into the second space via the hinge mechanism.