There is provided a wall mounting device for mounting a display apparatus on a wall, the wall mounting device including: a display apparatus coupling unit coupled with a central portion of the display apparatus along a first direction and including a plurality of locking parts arranged in a second direction, the second direction being substantially perpendicular to the first direction; and a wall coupling unit configured to be coupled with the wall and including a plurality of supporting sections arranged along the second direction configured to support the plurality of locking parts.