A display device includes a display unit having a function of showing a space behind a display screen transparently and a control unit for controlling the display unit based on an input video signal. The control unit controls the display unit to display a transparent video having a transparent portion through which the space behind the display screen can be seen transparently, while displaying a main video based on the input video signal. The control unit may generate an instruction signal indicating a display period of the transparent video and may control the display unit in accordance with the generated instruction signal, or may control the display unit in accordance with an instruction signal provided externally. With this, there is provided a see-through type display device which does not hinder a vision when displaying a video for a long time.