A head-mount type display device adapted to make a user visually recognize a virtual image includes an image light generation section adapted to generate image light representing an image using image data and then emit the image light, a light guide section adapted to guide the image light, which is emitted, to eyes of the user, a receiving section adapted to receive the image data, and a control section, which is connected to the receiving section, controls image display by the image light generation section, and has a transmitting section adapted to transmit the image data to the receiving section. The control section controls luminance of the image light generation section so as to degrade visibility of the virtual image for a predetermined period of time in a case in which a disturbance in data communication between the transmitting section and the receiving section is presumed.