This is an improved version of the square sheet machine, for alleviating workload of the operator for couching. The couch roll is placed behind the water cylinder of sheet machine. It is taken out before couching. Place the roll to vertically move it by the up-down lever. The roll is slowly placed down on the wet mat. At the end of the paper making, the roll is returned to the storage. Since it is not necessary to lift the couch roll by hand, it is very effective to prepare many sheets.