Provided is a cover for a recessed lighting apparatus, including: a plurality of profiles, each including a first insertion groove having a coupling member inserted thereinto, a second insertion groove connected to the first insertion groove and formed to have a screw inserted thereinto, and a holding plate formed to have a diffuser plate stably mounted thereon; and an L-shaped coupling member including a body part and a wing part configured to be connected to the body part, inserted into the first insertion groove to be combined with a profile adjacent thereto using a screw, and a lever configured to be separable from a recessed metal housing formed to receive a lighting device therein, the plurality of profiles and the L-shaped coupling member being configured to receive the diffuser plate therein and configured to be separable from the metal housing.