To provide an Fe-based nano crystal alloy thin band laminate capable of being integrally treated due to large adhesive force between alloy thin bands after heat treatment, for solving problems that the alloy thin bands detach from each other and adhesive strength is low after the heat treatment at 500°C or higher of a conventional amorphous alloy thin band laminate for the Fe-based nano crystal alloy thin band laminate treated by application of polyimide resin on its surface and thermocompression thereof.

An Fe-based nano crystal alloy thin band laminate is a laminate in which a plurality of Fe-based nano crystal alloy thin bands are laminated. The neighboring Fe-based nano crystal alloy thin bands are adhered to each other with a polyimide resin having a structure of biphenyltetracarboxylic dianhydride (BPDA) and p-phenylenediamine (PPD). An average of resin thickness of the polyimide resin is equal to or greater than 2 μm and equal to or less than 16 μm, and three-point flexural strength is equal to or greater than 0.3 Pa.