This invention provides a process for efficiently producing a biaxially oriented polyamide resin laminated film roll that can realize bag making by lamination with high efficiency at high yield even under high humidity conditions. The production process of a film roll comprises a melt extrusion-cooling step of melt extruding a polyamide resin onto the surface of a movable cooling material into a sheet form and cooling the extrudate to form an unstretched sheet, a biaxially stretching step of biaxially stretching the unstretched sheet in longitudinal and transverse directions, and a winding step of winding the biaxially stretched film into a roll form. In the melt extrusion-cooling step, in melt extrusion-cooling of the polyamide resin on the movable cooling material surface, corona discharge in a streamer corona state is carried out between an electrode, to which a direct current high voltage has been applied, and the polyamide resin laminated sheet in a melted state to impart, to the polyamide resin laminated sheet in a melted state, charges sufficient for adhesion to the movable cooling material surface.