A vehicle door attached to a vehicle body includes a bracket structure disposed between an interior-side panel and an exterior-side panel to support a door lock portion. The bracket structure has an interior-side extension portion disposed on an interior-side and joined to the interior-side panel, and an exterior-side extension portion disposed on an exterior-side and joined to the exterior-side panel. Extension portions extend in an upper-lower direction. As an alternative, a vehicle door includes a middle panel disposed between an inner panel and an outer panel, and a bracket structure disposed between the inner panel and the middle panel to support the door lock portion. The bracket structure has a front extension portion disposed frontward and joined to the inner panel, and a rear extension portion disposed rearward and joined to the middle panel. Extension portions are disposed in a front-rear direction of a vehicle and extend upward.