Disclosed is a method of manufacturing a frame structure for a portable terminal, which can separate a metal frame structure into a machined part and a cast part to minimize machining and increase productivity and quality of the frame structure. The method of manufacturing a frame structure for a portable terminal includes: a frame manufacturing step of manufacturing a metal frame by machining a metal material and a metal bracket forming step of integrally forming a metal bracket on an inside of the metal frame by inserting the metal frame into a first mold and injecting molten metal.
