To provide a mounting bracket of a display device which can mount all of display devices varying in shapes and can close a peep window of a housing when the display device is not mounted.

The mounting bracket used for installing the display device into the housing of a machine body in such a manner that its display section faces the peep window bored at the housing is provided with a supporting wall section which respectively discretely supports the plural display devices varying in the shapes and a closing wall section which is capable of closing the window of the housing.