To efficiently suction-convey a plate-like object and to laminate it after suction-conveying by preventing scratch on a surface of the plate-like object when the plate-like object is suction-conveyed or laminated after suction-conveying.

In the laminating method for the plate-like object, when the plate-like object is suction-conveyed and laminated, the plate-like object is sucked through a protection material of the plate-like object, i.e., a porous molded body having a continuous pore comprising a polyolefin based resin on the plate-like object to also suction-convey the protection material with the plate-like object, and the plate-like object and the protection material of the plate-like object are successively laminated.