To miniaturize a casing while facilitating the installation of a display module to the casing.

The display device is provided with a display module 11 which has a display surface 15 and has a first hole 9 at a surface opposite to the display surface 15, the casing 12 which is positioned at a side opposite to the display surface of the display module 11 and has a second hole 14 formed at a position corresponding to the first hole, and a screw which is screwable into the first hole 9 through the second hole 14 from a side opposite to the display module 11 of the casing 12 and fixes the display module 11 to the casing 12.