Abstract: The frame assembly for mounting a picture, painting, photograph or the like includes: a generally rectangular frame having an inwardly extending rear end flange; a backing board having a border or perimeter and being constructed and arranged to be received within the frame; at least two retainers slidably mounted on the backing board and being movable from a position not engaging the rear end flange of the frame and within the border of the backing board to a rear end flange engaging position where a hook of the retainer at a first end of the retainer is positioned beyond the border of the backing board and in front of the rear end flange for holding the backing board in the frame of the frame assembly.