A sheet paper conveyor includes pairs of conveyor guides that form a sheet paper conveyance path between guide surfaces which face each other with a predetermined conveyance path width between them and which are parallel to each other, and that are engaged with end portions of pairs of connection-side conveyor guides that form a conveyance path for the sheet paper using connection subject conveyance path guide surfaces that face each other with the conveyance path width between them and are parallel to each other, and with one end portions in a conveyance direction of the sheet paper. Supporting portions rotatably support the pairs of conveyor guides in accordance with positions of the pairs of connection-side conveyor guides such that the conveyance path width is maintained and such that the parallel state between the guide surfaces is maintained.