Flexible laminate and manufacturing method thereof, and a flexible printed circuit board

A laminate metal foil provided on one surface of the resin film A method of manufacturing a flexible laminate having one or more, a coating film by coating a varnish containing a polyamic acid and a solvent on a metal foil a coating step of forming, drying step of forming a holding step of holding in a state of forming the coating film on the metal foil described above, a layer consisting of removing at least part of the solvent in said varnish resin composition When, by heating the layer of the resin composition, and a resin film forming step of forming a resin film containing a polyimide resin. Based on the content of the metal elements resin film, to adjust the conditions of the respective steps during the later than coating step to the resin film forming step.