A method of sequentially laminating a carrier film-attached optical film laminate to a rectangular-shaped panel having a long side and a short side, is provided. The optical film laminate comprises an optical film including a thin polarizing film, and a carrier film attached to the optical film through an adhesive layer. The method comprises the steps: forming a plurality of slits in the carrier film-attached optical film laminate in a width direction thereof at lengthwise given intervals to extend from a surface of the optical film on a side opposite to the carrier film to a depth reaching a surface of the carrier film adjacent to the optical film to thereby form an optical film sheet supported by the carrier film, between lengthwisely adjacent two of the slits; and laminating each of the optical film sheets to a respective one of the panels through the adhesive layer, with peeling the optical film sheet from the carrier film just before the lamination position and superimposing the peeled optical film sheet on the panel fed to the lamination position, while holding a leading end of the optical film sheet in a moving direction thereof.