An embedded lamp comprises a base, an embedded bracket, a lamp socket, and a decorative plate, wherein a flange is formed on the internal periphery of a rotatable bracket of the embedded bracket for coupling with the decorative plate. A protrudent ring having at least a pair of buckling means having a pair of protrudent elastic buckles is mounted on the internal periphery of the decorative plate. When the decorative plate is inserted into the rotatable bracket, the protrudent elastic buckles are bounded to buckle the flange and to be positioned thereon. By means of the above-mentioned structure, the decorative plates with different internal diameter dimensions can be replaced with one another according to the diameter dimensions of various light bulbs without detaching the base and the embedded bracket. Accordingly, it facilitates the replacement of the light bulbs without need of high maintenance technique.