A vehicle door structure having an exterior surface of a glass window located in a vehicle door. A door window is vertically displaceable in conjunction with a slider. The slider has a vertically extending groove into which an end portion of the door window is fitted. An adhesive is provided between the end portion of the door window and the inside of the slider to fix the door window in the groove of the slider. The upper portion of the slider closes the space in which the adhesive is filled so that the adhesive does not spread out on the upper surface of the slider, thereby preventing accumulation of foreign matter such as dust and dirt, and adding to the aesthetic appearance of the assembly.