A cabinet includes a top wall, a bottom wall, two opposite sidewalls, and a roll door apparatus mounted between the top and bottom walls and positioned adjacent to one of the sidewalls. The top and bottom walls each define a slide slot perpendicular to the sidewalls and a number of cutouts communicating with the corresponding slide slot. The roll door apparatus includes a rotatable pole, a roll door rolled about the pole and fixed to the pole by a first end, a locking member mounted to a second end of the roll door opposite to the first end. The locking member includes a sliding portion top and bottom ends of which to be slidably received in one of the slide slots, and an engaging portion engaged in two of the cutouts of the top and bottom walls.