It is an object of the present invention to provide an
adhesive film which is used for producing, by a laminating method, a flexible
metal-clad laminate in which the change in dimensions is suppressed, a flexible
metal-clad laminate including the
adhesive film, and a production method therefor. The present invention relates to an
adhesive film including a
polyimide film and an adhesive layer containing a
thermoplastic polyimide, the adhesive layer being disposed on at least one surface of the
polyimide film, a flexible
metal-clad laminate produced by laminating a
metal foil to the adhesive film with a thermal roll laminator, and a production method therefor, wherein the polyimide film is formed by a process including step (A) of mixing a
polyamic acid solution, a dehydrating agent, and an imidization catalyst, and
casting and applying the mixture onto a support to form a gel film; step (B) of stripping off the gel film and fixing both ends of the gel film; and step (C) of heating and transporting the film with both ends being fixed in a state loosened in the TD direction.