Vehicle door 10 is provided which includes an inner door panel 11 made of a magnesium alloy. The magnesium alloy has relatively small toughness although it is light in weight. Passenger protecting cover 51 made of a material having greater toughness than the magnesium alloy is fixed to a portion of the inner door panel facing a seat 40 or its vicinity in overlapped relation to that portion. Such arrangements can reduce the weight of the vehicle door and enhance passenger protecting performance of the door.
