A display device includes a drive circuit on an insulating substrate; a connecting electrode electrically connected to the drive circuit; an LED element electrically connected to the drive circuit via the connecting electrode, and a first light reflecting layer overlapping the LED element and having an inclined surface. The inclined surface reflects light incident on the inclined surface through the LED element toward the connecting electrode. The first light reflecting layer may have a reflectance of 90 percent or more for light at a wavelength of 1.0 μm or more to 1.5 μm or less.