A kind of Combined coffin includes: bottom plate, is to include bottom plate front, bottom plate Hou side, the bottom plate left side, bottom plate the right； Foreboard engages the bottom plate front of what bottom plate； Hou plate engages the bottom plate Hou side of what bottom plate； Left plate engages the bottom plate left side of what bottom plate； Right panel engages bottom plate the right of what bottom plate； And cover board, tie up to above-mentioned five sheet material combination Hou, the top of lid what foreboard, Hou plate, left plate and right panel, to accommodate substantially space by six sheet materials composition one.一種組合棺木，包含：底板，係具有：底板前邊、底板後邊、底板左邊、底板右邊；前板，接合於底板的底板前邊；後板，接合於底板的底板後邊；左板，接合於底板的底板左邊；右板，接合於底板的底板右邊；以及，蓋板，係在上述五片板材組合後，蓋於前板、後板、左板及右板的上方，以便藉六片板材組成一容納大體空間。
