Abstract: A cabinet lamp comprises a mask, two clamping seats at two sides of the mask; each clamping seat having a recess; a lamp frame behind the mask; a light emitting body installed to the lamp frame; a reflecting mask within the mask; a transparent plate connected to and below the mask; each transparent plate having a stud capable of being received in a recess of one clamping seat; and a circuit box. The stud is swingable and slidable in the recess. A front end of the transparent plate is movable to enter into the two clamping seats along the trenches of the two clamping seats. When the transparent plate moves backwards, the front end of the transparent plate separates from the recesses, the transparent plate is swingable around the stud so that the light emitting body within the cabinet lamp is detachable.