Abstract: A motor vehicle door has an outer module and an inner module. The outer module contains an outer panel and an inner frame part to which an impact support and hinges can be fixed. For the motor vehicle door to have a simplified configuration and a low weight while having a high degree of rigidity, the inner frame part of the outer module is formed by a single-piece diecast part made of a metal alloy. The inner module contains an upper encircling window frame and a lower assembly support sheet. The upper window frame is configured as a single-piece diecast part made of a metal alloy. A lower frame part of the upper window frame is connected to the upper border region of the assembly support sheet with a longitudinally running hollow support being formed, and the upper window frame is connected locally to the inner frame part.