A rear housing of a display apparatus and the display apparatus are disclosed. The rear housing for the display apparatus includes a first case, a third case and a second case sequentially arranged in a lateral direction; a bottom of the first case includes a first retainer portion extending toward the second case, a bottom of the second case includes a second retainer portion extending toward the first case, and the first and second retainer portions are connected by means of a first connecting member; both sides of the third case are connected to the first case and the second case by means of second connecting members respectively.