DISPLAY DEVICE AND HEAD-UP DISPLAY

A display device includes: a display panel that includes, in a front surface, a display area in which an image is displayed, and projects, from the display area, light that has entered from a back surface as display light showing the image; a thermal conductive sheet that is disposed contacting the display panel, and has an opening positionally corresponding with the display area; and a light transmissive material that sandwiches the thermal conductive sheet together with the display panel.