The present invention relates to a head-mounted display including a pair of headphones having a built-in speaker for outputting sound, a first arm rotatably coupled to the pair of headphones to display an image, a second arm coupled to the pair of headphones so as to relatively rotate with the first arm to cover or uncover a front surface of the first arm, and a control unit controlling the image output to the first arm and the sound output to the headphones according to positions of the first arm and the second arm.