A display device according to the present invention comprises a display panel, a housing sealing around the display panel and making a display screen of the display panel viewable from outside, and a heat exchanger collecting heat, which is arranged on a rear surface side of the display panel. Another display device according to the present invention comprises a housing having a waterproof structure and provided with an accommodation room formed therein, a display panel arranged in the accommodation room and including a display screen viewable from a front surface side of the housing, a heat exchanger collecting heat generated from the display panel and arranged on a rear surface side of the display panel, and a second heat exchanger releasing heat collected by the heat exchanger to outside of the housing and arranged outside the accommodation room.