[PROBLEM TO BE SOLVED] To provide a polyamide based mixed resin laminated film roll with which bag-forming processing by lamination is able to be performed smoothly and with high yield ratio and at the same time with which packages free of S-shaped curls can be obtained efficiently. [SOLUTION] The polyamide based mixed resin laminated film roll of the present invention is formed by winding up polyamide based mixed resin laminated film formed by laminating multiple polyamide-based mixed resin sheets includes a first sample cutout portion within 2 m from the winding end of film and a final cutout portion within 2 m from the winding start of film, and when a sample cutout portion is set up in approximately every 100 m from the first sample cutout portion, in all samples cut out from each of the cutout portions, physical properties such as elastomer content, elastic modulus in tension, thickness irregularities in the longitudinal direction, etc. are adjusted to be within a predetermined range of variation range.