PANEL DOOR FOR VEHICLE HAVING IMPROVED STIFFNESS

A panel door applied for a vehicle including a stiffness member made of a plastic material and integrally formed on an internal surface of the panel door, includes an external panel, an internal panel coupled to the external panel, and a stiffness member formed to connect a frame forming a circumference and stiffness elements provided for reinforcing stiffness inside the frame and coupled to at least one of the external panel and the internal panel.