A cylindrical jigsaw puzzle includes a bottom rim having an outer flange,
an inner flange and a first gap between the outer flange and the inner
flange, a top rim having a ring body, a positioning flange extending from
an inner face of the ring body and a second gap defined between the ring
body and the positioning flange, top puzzle pieces each having a first
assembly edge corresponding to and received in the second gap of the top
rim and bottom puzzle pieces each having a second assembly edge
corresponding to and received in the first gap of the bottom rim.
Combination among the top puzzle pieces with the top rim mounted thereon,
bottom puzzle pieces with the bottom rim mounted thereunder and a cap
mounted on top of the top rim is able to accomplish a cylinder.