Method for producing laminated film having an adhesive layer including a preparation step and a shape processing step for efficiently producing a laminated film having a soft adhesive layer

The present invention provides a method for producing a laminated film, suitable for efficiently producing a laminated film having a soft adhesive layer. According to the present invention, the method for producing a laminated film includes a preparation step and a shape processing step. In the preparation step, a long workpiece film (W) having a film layer 10, an adhesive layer 20 and a film layer 30 in sequence in the thickness direction H are prepared. The adhesive layer 20 has a shear storage modulus of 100 kPa or less at 25 DEG C. In the shape processing step, the workpiece film W is irradiated and scanned with laser light L from the film layer 30 side, and the adhesive layer 20 and film layer 30 are cut off on the film layer 10. In the shape processing step, the spot diameter of the laser light irradiated on the workpiece film W is 50 [mu]m or more.