To reduce weight and to secure a wide indoor space by eliminating a housing, while reducing manhours as a door assembling line.

This invention is for the vehicle door, and includes a door panel provided with a side window glass opening 12 for inserting side window glass 41 and a cutout part 13 formed on its vehicle indoor side so as to be continued to the side window glass opening 12, a sub-panel 11 installed on and fixed to the door panel in a state of closing the cutout part 13, and a pair of guide rails 52F and 52R arranged on both sides of a shade 51 in a sun shade device 50 and guiding pulling-out and taking-up of the shade 51. Both guide rails 52F and 52R are connected by the sub-panel 11, and a window regulator 60 for performing opening-closing operation of the side window glass 41 is installed on the door panel via the side window glass opening 12 and the cutout part 13.