Vehicle door frame and method for manufacturing the same

A method for manufacturing a vehicle door frame including an elongated member (10) formed with a plurality of bent portions in the longitudinal direction thereof (12) characterized in that the method comprises the steps of: an elongated member forming step (S10) for forming the elongated member (10) in which the hollow main body (12), the connecting portion (13) and the flange portion (14) are formed integrally; a liner inserting step (S20) for inserting a liner (20) into the hollow main body (12) of the elongated member (10); a slit forming step (S30) for forming a slit (16) in the connecting portion (13) of the elongated member (10) ; a bending step (S40) for forming a bent portion (10a) by bending the elongated member (10); a notch portion forming step (S50) for forming a notch portion (10b) by trimming off a part of the flange portion (14) and the connecting portion (13); and a vehicle door frame finishing step (S60) for finishing the vehicle door frame by fixing a bracket (60) into the notch portion (10b).