Abstract: The device includes an assembly tray for holding assembled pieces of a jigsaw puzzle and includes two storage trays for holding unassembled puzzle pieces. The storage trays are adapted to be placed in side-by-side relation in the assembly tray and hold the assembled puzzle pieces in assembled relation when the device is picked up and carried. Filler blocks are adapted to be placed in the storage trays to hold the unassembled pieces therein in position when the device is picked up and carried. A releasable cover holds the filler blocks, the storage trays and the assembly tray together as a compact unit.