To provide a stage which is easy to mount and remove a stage floor panel and free of damaging the panel when it is removed.

A plurality of temporary stage floor panels 2 are provided on a support frame rack of the temporary stages which can be assembles and disassembled and which is shapes up like a frame when viewed on the plane so that they may adjoin each other. The temporary states from a downward L-shaped locking area 2b on the edge of the floor panel 2 where an upward U-shaped floor panel locked area 10 having a spacing whose width is equivalent to about twice the thickness of the locking area 2b of the floor panel, is integrally provided on the support frame rack. Both locking areas 2b of the adjacent floor panels 2 are fitted in the locked area 19 of the support rack so that they may be fixed.