Door frame for vehicle

A door frame for a vehicle, the door frame comprising:

• an inboard panel including an outer peripheral wall, an inner peripheral wall spaced apart from the outer peripheral wall, and an inboard side wall connecting the outer peripheral wall and the inner peripheral wall, wherein the outer peripheral wall extends obliquely from the inboard side wall at a predetermined angle, and wherein the outer peripheral wall has a mounting hole configured to mount a door weatherstrip;
• and
• an outboard panel coupled to the inboard panel,
• wherein the inboard panel further includes a first flange extending from the outer peripheral wall, a connecting wall connecting the outer peripheral wall and the first flange, and a support shoulder arranged on the connecting wall, and
• wherein the support shoulder is recessed from the connecting wall toward the inner peripheral wall.