Abstract: An adapter for suspending from the strings of Christmas lights includes an adapter having a longitudinal groove in cooperation with a pair of arcuate slots for disposing an electric power wire and a pair of transverse flanges for coupling a pair of coupling plates on a press box in a snap fitting. The press box has a pair of contact plates connected to one end of a pair of subordinate electric wires which has other ends extending downward from the bottom of the press box to further connect the strings of Christmas lights in a pattern plate. The contact plates each has a pair of tip points on the top to respectively pierce into the electric power wire to obtain the electricity in order to light the strings of the Christmas lights.