A display device that includes an attachment part mountable on a head of a user, a control device to control the attachment part, and a transmission cable to connect the attachment part with the control device, further includes an imager; a first converter configured to convert a digital signal from the imager into an analog signal; a second converter configured to convert the analog signal into a video signal; a laser light generator configured to generate a laser light modulated depending on the video signal; an optical scanner configured to scan the laser light; and an optical projection system configured to project the scanned laser light to form an image. The imager, the first converter, the optical scanner, and the optical projection system are placed in the attachment part. The second converter and the laser light generator are placed in the control device. The analog signal and the laser light are transmitted via the transmission cable.