The present disclosure relates to a wall mounted washing machine and a rear panel thereof. The wall mounted washing machine includes a rear panel operable to be mounted on a wall; a tub supported on the rear panel, the tub operable to be filled with wash water; a front panel having an opening formed therein and installed in the tub; a drum rotatably installed in the tub; a cover installed on the front panel and for covering the front panel; a door rotatably coupled to the cover for opening or closing a laundry inlet of the cover; and a cabinet having a front surface and a rear surface to be opened to form an appearance, the cabinet including rear panel connection parts connected to the rear panel and enclosing the tub.