Abstract: A picture frame assembly comprising a folder having two rectangular flanges on two symmetrical face panels thereof to hold two picture-frames respectively, wherein the rectangular flanges each comprises at least one L-shaped notch on a peripheral side edge thereof, and a magnet on a top cross wall thereof for holding either picture-frame; the picture-frames each comprises at least one tenon on a peripheral edge thereof respectively inserted in the at least one L-shaped notch on either rectangular frame, and an iron plate on a back surface adjacent to a top edge thereof attracted by the magnet.