DISPLAY DEVICE

A display device that can prevent interference with a vehicle body and ensure a sufficient strength of the attachment stay is provided. A display device includes a display portion that displays information, and a case member housing the display portion. The case member includes an attachment portion protruding outward from an outer wall. The display device is to be installed in a vehicle by fixing the attachment portion to the vehicle. The case member includes a reinforcing portion and the reinforcing portion includes a protruding piece protruding inward from the outer wall and a rib portion extending across the outer wall and the protruding piece. The reinforcing portion is formed in a position facing the attachment portion.