The present invention provides an automotive door enhanced with the absorption performance for the collision energy in the side collision. The automotive door constructed of an outer panel and an inner panel, comprising a door beam for a side collision therewithin, and provided with a glass ascending/descending space between the inner panel and the door beam for a side collision comprises a reinforcing panel disposed in a space between the outer panel and the glass ascending/descending space and joined with both of the outer panel and the door beam for a side collision.