To provide a method for producing a multilayer coextrusion polyimide film free from partial sticking of a polyimide layer on a substrate when polyamic acid solutions are flow-cast on the substrate by multilayer coextrusion.

A method is for manufacturing a multilayer polyimide film obtained by flow-casting plural polyamic acid solutions on a substrate by multilayer coextrusion, and laminating a thermoplastic polyimide layer including at least thermoplastic polyimide at least on one side of a non-thermoplastic polyimide layer including at least non-thermoplastic polyimide. An imidation catalyst exists only in a polyamic acid solution having direct contact with a substrate.