A wall mounted washing machine and a door thereof are disclosed. The wall mounted washing machine includes a cabinet having a front surface and a rear surface to be opened to form an appearance; a tub disposed in the cabinet to store wash water; a front panel installed in the tub; a drum rotatably installed in the tub: a cover installed in the front panel and provided with a door hinge; and a door rotatably coupled to the door hinge and having a door glass supported by a door inner frame and a door outer frame combined each other. The door includes a door inner frame disposed toward the cover; a door outer frame coupled to the door inner frame; a protective glass provided on the front surface of the door outer frame and formed with a hole at its one side; and a door opening button exposed to the outside through the hole of the protective glass, the door opening and closing employing an electronic opening and closing system. The door opening button does not extend to out of the protective glass.
