In an integrally embedded AC/DC double-headed lamp, at least one illuminative element is disposed on a lamp board, two sides of the light board are respectively disposed with a conductive terminal used for letting in a lamp seat to electrically connect to the lamp seat and an integrally formed cover body is used to cover the illuminative element directly thereby reducing the processing time and elevating the production efficiency, further attaining to the cost reducing object. Furthermore, the illuminative element is allowed to generate a different illumination effect through a different cover body to provide a user with different illumination and decoration uses.