A wall mounted washing machine and a door thereof are disclosed, which are capable of fluid or moisture discharge. 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 having 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 coupled to each other. The door includes gas passage portions disposed around the door glass to interconnect the inner space of the door glass and the inner space of the door.
